Great earthquake rocks Chile; NYC gets 4th greatest snow ever; Xynthia batters Europe

By: Dr. Jeff Masters , 17:26 GMT le 27 février 2010

Share this Blog
2
+

A great earthquake with magnitude 8.8 rocked the coast of Chile at 6:34 GMT this morning, generating a potentially dangerous tsunami that is racing across the Pacific Ocean. The great quake is the 7th most powerful tremor in world history (Figure 1). Preliminary tsunami wave heights for the California coast near Santa Barbara are 2 - 2.5 feet. The wave is expected to arrive between 12:15 - 12:35 pm PST. The tsunami is expected to arrive in Hawaii between 11:05 - 11:42am HST, with a wave 8.2 feet high expected in Hilo, on the Big Island. A tsunami from the 9.5 Magnitude 1960 earthquake in Chile killed 61 people in Hilo. Today's quake was so strong, that it triggered a seiche in Lake Pontchartrain, Louisiana, over 4,500 miles (7,000 km) away. The lake sloshed back and forth, creating a wave 0.4 - 0.51 feet on either side of the lake.


Figure 1. Wikipedia's list of strongest earthquakes of all-time.

Preliminary tsunami amplitude forecasts:

La Jolla, CA 2.3 ft
Los Angeles, CA 2.0 ft
Malibu, CA 2.6 ft
Pt. San Luis, CA 2.3 ft
Half Moon Bay, CA 2.6 ft
Crescent City, CA 1.7 ft
Morro Bay, CA 2.2 ft
Santa Monica, CA 3.3 ft
San Francisco, CA 0.7 ft
Pismo Beach, CA 4.6 ft

Hilo, HI 8.2 feet 11:5am HST
Honolulu, HI 1.6 ft 11:37am HST
Kahului, HI 7.2 ft 11:26am HST
Nawiliwili, HI 3.0 ft 11:42am HST
Haleiwa 1.6 ft
Kawaihae 2.0 ft

Port Orford, OR 0.7 ft

Moclip, WA 1.3 ft

Seward, AK 1.3 ft
Stika, AK 1.3 ft
Kodiak, AK 2.3 ft

Tofino, British Columbia 1.7 ft

Today's great quake occurred at the boundary between the Nazca and South American plates about 325 km southwest of the capital Santiago (population 5.3 million). The depth was estimated at 35 km. At least four aftershocks of magnitude 6 or higher have occurred, the largest being a 6.9 aftershock. Fortunately, the area close to the epicenter is relatively sparsely populated, but there may be heavy damage in Concepción (est. pop. 300,000) and Chillan (est. pop. 170,000), which lie 115 km and 100 km to the south of the epicenter, respectively.


Figure 2. NOAA's preliminary forecast of tsunami wave energy for today's earthquake. Image credit: NOAA Tsunami Warning Center.

New York City slammed with its 4th largest snowstorm on record
The snow from the fourth extreme snowstorm to wallop the Northeast U.S. this winter dumped a remarkable 20.9" of snow on New York City's Central Park yesterday and Thursday. This is the 4th largest snowstorm for the city in recorded history. According to the National Weather Service, the top ten snowstorms on record for New York City's Central Park are:

26.9" Feb 11-12, 2006
26.4" Dec 26-27, 1947
21.0" Mar 12-14, 1888
20.9" Feb 25-26, 2010
20.2" Jan 7-8, 1996
19.8" Feb 16-17, 2003
18.1" Mar 7-8, 1941
17.7" Feb 5-7, 1978
17.6" Feb 11-12, 1983
17.5" Feb 4-7, 1920

The storm also helped New York City set a new all-time snowfall record for the most snow ever recorded in a month--36.9". The old record was 30.5", set in March 1896. However, the old Lower Manhattan WB Station recorded 37.9" in February 1894. Yesterday's snowstorm puts New York City's snow for the 2009 - 2010 season at 51.4", making it the 11th snowiest winter since 1869. Chris Burt, author of Extreme Weather, lists the city's all-time seasonal snowfall record at 81.5", set in the winter of 1867 - 1868. This measurement came before official records began in Central Park, and were done be the NY Park Commissioners (see "Annual Report NY Park Commissioners", 1868, by John B. Marie). The second snowiest winter in NYC occurred during the winter of 1995 - 1996, when 75.6" fell.

Destructive Winter Storm Xynthia battering Portugal and Spain
A powerful 969 mb low pressure system named "Xynthia" is rapidly intensifying of the coast of Spain, and stands poised to deliver a devastating blow to Portugal, Spain, and France today and tomorrow as it powers through Europe. Sustained winds of 60 mph (96 km/hr) were reported today at a Personal Weather Station in Costa del Morte, Spain. The pressure fell to 969 mb as Xynthia passed overhead. For comparison, Winter Storm Klaus had a minimum pressure of 967 mb. Klaus, which hit northern Spain and southwest France January 23 - 25, was Earth's most costly natural disaster of 2009, causing $5.1 billion in damage and killing 26. Models predict that Xynthia will continue to intensify today, reaching 962 mb as it moves into the west coast of France Sunday morning. Sustained winds of 50 - 65 mph (80 - 105 km/hr) with hurricane-force gusts up to 100 mph (160 km/hr) are possible along the north coast of Spain tonight and the west coast of France on Sunday as Xynthia barrels through. The storm is also bringing an exceptionally moist plume of tropical moisture ashore, as seen in precipitable water imagery from NOAA (Figure 4). This moisture is likely to cause moderate to severe flooding in portions of Europe over the weekend.


Figure 3. Visible satellite image at 12 GMT of Xynthia.


Figure 4. Satellite measurements show a region of extremely high atmospheric moisture is associated with Winter Storm Xynthia. This moisture will surge over Portugal and Spain today, potentially creating serious flooding. Image credit: Sheldon Kusselson, NOAA/NESDIS.

Links to follow:
Wundermap for Northwest Spain
Spanish radar
Meteo-France
Portugese radar

Jeff Masters

Central Park 26Feb10 (MickyDee)
the BIG one Taken in Manhattan
Central Park 26Feb10
Tree 1, House 0 (Backbaybob)
This cottage was no match for 65 mph wind and an old pine tree.
Tree 1, House 0

Reader Comments

Comments will take a few seconds to appear.

Post Your Comments

Please sign in to post comments.

or Join

Not only will you be able to leave comments on this blog, but you'll also have the ability to upload and share your photos in our Wunder Photos section.

Display: 0, 50, 100, 200 Sort: Newest First - Order Posted

Viewing: 516 - 466

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22Blog Index


http://earthquake.usgs.gov/earthquakes/eqarchives/poster/2010/20100227.php
Member Since: 22 septembre 2005 Posts: 11 Comments: 2032
Quoting KEEPEROFTHEGATE:
here is a 12 h animation of your storm


It has some of the best cold advection behind it that I've seen all winter here with a synoptic-scale storm. That other storm to the far west approaching the Aleutians is gonna move in behind it on Tuesday and Wednesday next week, and all that cold air building up over the state is going to make it a pretty snowy week. It will be quite a way to start off March considering our entire winter has averaged 10 degrees above normal here in Homer.
Member Since: Posts: Comments:
Quoting Ossqss:
485, they use acoustic transducers for comm? That is interesting. I wonder if the seismic activity (noise) interfered with the comm or distorted/altered it? Hence reporting anomalous measurements at the buoy's.

I dunno...I really cannot say.

I have a retired 30-year NDBC vet on the other side of the cubicle at work...I'll make it a point to ask Monday. He prolly knows off the top of his head the exact cause. (This guy was involved in everything from wave calibrations based on the hull shape of the moored buoys to building dial-a-buoy to the webpage layout, etc.)
Member Since: 16 août 2007 Posts: 6 Comments: 12463
Quoting P451:


So you didn't venture into the woods to wrestle a bear or kill a moose with your bare hands?

You disappoint me.

lol.



LOL..no,I was a Lil soft in the head at 24 still they say.
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Quoting Levi32:
Oh yeah you sound really intrigued lol...

~~~~~

Pretty big snowstorm moving into southern Alaska...I'm expecting up to 10 inches of snow through Monday.

here is a 12 h animation of your storm
Member Since: 15 juillet 2006 Posts: 174 Comments: 54364
Quoting Patrap:
Only time I was in Alaska Levi was in Sept 84,gassing up a MAC Flight 747 from Okinawa Okinawa I was on returning from a year in Japan.

They made us get off for the fueling and I drank a Heiniken in the Airport.



You probably would have needed it if it was during the winter.
Member Since: Posts: Comments:
Only time I was in Alaska Levi was in Sept 84,gassing up a MAC Flight 747 from Okinawa I was on returning from a year in Japan.

They made us get off for the fueling and I drank a Heiniken in the Airport.

Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
508. Skyepony (Mod)
MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

GAUGE LOCATION LAT LON TIME AMPL PER
------------------- ----- ------ ----- --------------- -----
KAWAIHAE HAWAII 20.0N 155.8W 2211Z 0.52M / 1.7FT 24MIN
BARBERS PT HI 21.3N 158.1W 2140Z 0.19M / 0.6FT 76MIN
KAUMALAPAU HAWAII 20.8N 156.9W 2136Z 0.18M / 0.6FT 56MIN
KAHULUI MAUI 20.9N 156.5W 2147Z 0.98M / 3.2FT 22MIN
NAWILIWILI KAUAI 22.0N 159.4W 2151Z 0.28M / 0.9FT 44MIN
PAGO PAGO AS 14.3S 170.7W 2132Z 0.66M / 2.2FT 12MIN

Member Since: 10 août 2005 Posts: 174 Comments: 38167
Oh yeah you sound really intrigued lol...

~~~~~

Pretty big snowstorm moving into southern Alaska...I'm expecting up to 10 inches of snow through Monday.

Member Since: Posts: Comments:
Cool..

Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Quoting Patrap:
Thats Okay..

Most couldnt spell "Levee" till 2005 here too Levi.

LOL


Lol...well I always knew, considering that's one of my brother's nicknames for me..lol
Member Since: Posts: Comments:
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Xynthia in action ... Will reach us in Germany during the next hours. Pressure is dropping rapidly.
link
Member Since: Posts: Comments:
502. Skyepony (Mod)
A TSUNAMI HAS BEEN OBSERVED AT THE FOLLOWING SITES

LOCATION LAT LON TIME AMPL
------------------------ ----- ------ ------- -----------
CRESCENT CITY CA 41.7N 124.2W 0006UTC 0.60M/2.0FT
SITKA AK 57.1N 135.3W 0027UTC 0.14M/0.5FT
WINTER HARBOUR BC 50.7N 128.3W 2313UTC 0.24M/0.8FT
CHARLESTON OR 43.3N 124.3W 2206UTC 0.12M/0.4FT
SANTA MONICA CA 34.0N 118.5W 2022UTC 0.71M/2.3FT
PORT ORFORD OR 42.7N 124.5W 2140UTC 0.27M/0.9FT
SAN DIEGO CA 32.7N 117.2W 2052UTC 0.33M/1.1FT
SANTA BARBARA CA 34.4N 119.7W 2252UTC 0.72M/2.3FT
POINT REYES CA 38.0N 123.0W 2235UTC 0.26M/0.8FT
LA PUSH WA 47.5N 124.4W 2254UTC 0.11M/0.4FT
TSUNAMI AMPLITUDES ALONG THE OREGON AND WASHINGTON COAST CONTINUE
BELOW DANGER LEVELS. AMPLITUDES OBSERVED ALONG THE CALIFORNIA
COAST ARE STILL ABOVE DANGER LEVELS AT A FEW LOCATIONS - SUCH AS
CRESCENT CITY. TSUNAMIS ARE STILL INCREASING ALONG THE BRITISH
COLUMBIA COAST AND ARE JUST ARRIVING AT ALASKA LOCATIONS.

TIME - TIME OF MEASUREMENT
AMPL - TSUNAMI AMPLITUDES ARE MEASURED RELATIVE TO NORMAL SEA LEVEL.
IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT.
VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT).

Member Since: 10 août 2005 Posts: 174 Comments: 38167
Thats Okay..

Most couldnt spell "Levee" till 2005 here too Levi.

LOL
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
485, they use acoustic transducers for comm? That is interesting. I wonder if the seismic activity (noise) interfered with the comm or distorted/altered it? Hence reporting anomalous measurements at the buoy's.
Member Since: 12 juin 2005 Posts: 6 Comments: 8186
Oh my bad, guess I missed it, thanks.
Member Since: Posts: Comments:
Posted by: JeffMasters, 11:26 AM CST on February 27, 2010
A great earthquake with magnitude 8.8 rocked the coast of Chile at 6:34 GMT this morning, generating a potentially dangerous tsunami that is racing across the Pacific Ocean. The great quake is the 7th most powerful tremor in world history (Figure 1). Preliminary tsunami wave heights for the California coast near Santa Barbara are 2 - 2.5 feet. The wave is expected to arrive between 12:15 - 12:35 pm PST. The tsunami is expected to arrive in Hawaii between 11:05 - 11:42am HST, with a wave 8.2 feet high expected in Hilo, on the Big Island. A tsunami from the 9.5 Magnitude 1960 earthquake in Chile killed 61 people in Hilo.

Today's quake was so strong, that it triggered a seiche in Lake Pontchartrain, Louisiana, over 4,500 miles (7,000 km) away. The lake sloshed back and forth, creating a wave 0.4 - 0.51 feet on either side of the lake.
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Read The above entry from Jeff Masters,first Paragraph
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
What was making Lake P get all rustled up for?
Member Since: Posts: Comments:
I bet the mullets were going round cussing too.
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
I get BURL 1 Stuck in my Head for some reason..LOL
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654

? Nothing at Southwest Pass, but yeah New Canal and Shell Beach do.

Shell Beach:
(SHBL1)
Member Since: 16 août 2007 Posts: 6 Comments: 12463
The LUMCON Lake data will make ya grin as well atmo.


Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Quoting StSimonsIslandGAGuy:


So was it a malfunction of some kind? I wondered about that when I saw the readings right from the start, since I had read that tsunamis were only a few feet at most in the open ocean.

I dunno. What? 3 of them showed it between yesterday and today? I think so.
Member Since: 16 août 2007 Posts: 6 Comments: 12463
Georges in 98 was the first time ever NOLA was ordered evacuated.

Also,,in 05 we bounced out for Dennis,..had a swipe by Cat-1 Cindy in July,..so folks were kinda weary when K came along.

Me..I was like a deer in Headlights from Thursday to Saturday when I sent the fam out. Then its a Big bad blur to Sept 16th till we were reunited in Memphis..

Will always hold Tennessee in my Grace for sheltering them till I arrived 19 days later too.
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
And Lake P is just settling down after getting shaken awake this morning.

Member Since: 16 août 2007 Posts: 6 Comments: 12463
P451 --- agreed about the urgency thing. I think it went back to exactly what is being said here: we hadn't had a direct hit since 1965 with Betsy, so after awhile people didn't get too concerned. Also, as the weekend approached, the forecast still had the cone further east along the Gulf Coast. It wasn't until early Sat. morning that New Orleans fell in the cone. I do have to say that, as I was watching on Thursday and Friday, you couldn't help but notice the cone shifting westward with every new report.

It wasn't the first time I left, and it won't be the last, I'm sure, but I do know, I'll ALWAYS come back. Wouldn't want to live anywhere else.
Member Since: Posts: Comments:
Spring is a coming Robert..but as atmo can probably quote the number..we havent had many but 3 days or so where we have reached 70 F in 2010 so far.



So yes,itsa been a real winter again here...courtesy of El Nino.
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Quoting VAbeachhurricanes:
How does a bouy measure the water column anyway?


"DART systems consist of an anchored seafloor bottom pressure recorder (BPR) and a companion moored surface buoy for real-time communications (Gonzalez et al., 1998). An acoustic link transmits data from the BPR on the seafloor to the surface buoy.

The BPR collects temperature and pressure at 15-second intervals. The pressure values are corrected for temperature effects and the pressure converted to an estimated sea-surface height (height of the ocean surface above the seafloor) by using a constant 670 mm/psia. The system has two data reporting modes, standard and event. The system operates routinely in standard mode, in which four spot values (of the 15-s data) at 15-minute intervals of the estimated sea surface height are reported at scheduled transmission times. When the internal detection software (Mofjeld) identifies an event, the system ceases standard mode reporting and begins event mode transmissions. In event mode, 15-second values are transmitted during the initial few minutes, followed by 1-minute averages. Event mode messages also contain the time of the initial occurrence of the event. The system returns to standard transmission after 4 hours of 1-minute real-time transmissions if no further events are detected."
http://www.ndbc.noaa.gov/dart/dart.shtml

Short answer: pressure differential.
Member Since: 16 août 2007 Posts: 6 Comments: 12463
Preparation and Planning are key for the Federal,State,Local and individual when considering Evacuations.

Make a Plan,..
Make sure your Family knows the plan,.. Enact your EMg Plan when told to do so.

Dont Hesitate.


Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
Well s
Quoting Patrap:
Folks generally can post what they sense what happened here in 2005 with Katrina,..
I used to correct a lot of those misconceptions but I've moved on to not addressing them directly.

But heres the facts as I saw them..

One could have drove outta NOLA till 0515 am the morning of the 29th,2005..and not 300 miles west or north,..as no Lives would have been lost if everyone was just west of the 17th St. Canal ,which is only 4 miles West of the Superdome.

All the drownings were near or close to the outfall Canals and other breeches,Like the Lower 9th,..
Folks sometimes make bad decisions and sometimes dont see the next Dawn.

Then again some dont use seatbelts too.

We've all learned hard lessons and we strive to learn and build on them.

Lets always focus on what we can do,..


Well said. Its just frustrating to have everyone treat us like we're a bunch of lowlifes, when, in their hearts, most of them wished they lived in a place as fun and exciting as New Orleans. They see what they want to see and hear what they want to hear, and I blame the media for most of it. Ever notice, no one makes mention of the fact that our new public school model created post-Katrina is been touted as a model for other school systems across the country?

Maybe one day...at least we have the Saints.

BTW...is it EVER going to get warm again here in NOLA? I'm really sick of this ongoing cold stuff.

Thats why I prefer to get my info regarding major weather events from Wunderground. Very little hype, just the real facts and I can make my own decisions.
Member Since: Posts: Comments:
But, as Patrap pointed out, excellent job by all involved. Looked like clockwork plans to me.

I'd feel real safe in HI. Anyone that loses a life in a tsunami there has no one to blame but themselves, from what I saw.
Member Since: Posts: Comments:
Quoting TampaSpin:
I wonder why the bouy only just over 100nautical miles off shore showed such a strong tsunami. Very strange as if fizzled just before the islands.

Inaccurate...something about those buoys reading 30 meter water level changes in deep water at the 15 second or 1 minute sampling rate isn't showing us real water level data. (Really, that is simply too much to be a tsunami, anyway. 30 meters displacement in deep water is way, way too much.)

And it is too much to just be giving regular ocean waves.
Member Since: 16 août 2007 Posts: 6 Comments: 12463
You know, had there been a tsunami, it would have been very absent minded to go to the beach and take pictures... Thankfully something happened and there was no tsunami, but i am curious as to what your plan was if the ocean did pull back? Ready your camera or run?
In my book that was an unnecessary risk.
Member Since: Posts: Comments:
Quoting tornadofan:


Power of prayer, maybe?
well i did ask to take this evil vision from my sight who knows maybe he heard me
Member Since: 15 juillet 2006 Posts: 174 Comments: 54364
Quoting sflweatherguy:



Very well said, unfortunately its human nature that many that evacuated this time probably wont the next time, i remember in 1992 when Andrew hit S Fl, some people where still thinking it wasn't going to hit even though it was headed straight to us, but since we hadn't been hit for many years since 1965 people somehow forget what can happen. But yes the authorities did a great job in Hawaii.


Anyone thinking of being complacent, just show them this. And now is probably a good time to drill it home (hint, hint AIM).

(Opens in WMV)
Member Since: Posts: Comments:
Your passion and numbers are most admirable and welcome RobertM320..


Folks generally can post what they sense what happened here in 2005 with Katrina,..
I used to correct a lot of those misconceptions but I've moved on to not addressing them directly.

But heres the facts as I saw them..

One could have drove outta NOLA till 0515 am the morning of the 29th,2005..and not 300 miles west or north,..as no Lives would have been lost if everyone was just west of the 17th St. Canal ,which is only 4 miles West of the Superdome.

All the drownings were near or close to the outfall Canals and other breeches,Like the Lower 9th,..
Folks sometimes make bad decisions and sometimes dont see the next Dawn.

Then again some dont use seatbelts too.

We've all learned hard lessons and we strive to learn and build on them.

Lets always focus on what we can do,..
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
2010 National Hurricane Conference

March 29 - April 2|Orlando Hilton|Orlando, FL

The nation's forum for education and professional training in hurricane preparedness!


Mark your calendar for the 2010 conference
March 29-April 2 * Hilton Orlando, Orlando, Florida


Purpose of the Conference

The primary goal of the National Hurricane Conference is to improve hurricane preparedness, response, recovery and mitigation in order to save lives and property in the United States and the tropical islands of the Caribbean and Pacific. In addition, the conference serves as a national forum for federal, state and local officials to exchange ideas and recommend new policies to improve Emergency Management.

To accomplish these goals, the annual conference emphasizes:



* Lessons Learned from Hurricane Strikes.

* State of the art programs worthy of emulation.

* New ideas being tested or considered.

* Information about new or ongoing assistance programs.

* The ABC's of hurricane preparedness, response, recovery and mitigation -- in recognition of the fact that there is a continual turnover of emergency management leadership and staff.


Also,..

Here's a Special Announcement,our own wunderblogger,"sandcrab"..also known as "Butch Loper",retired Emg Mgr for Jackson,County ,Mississippi.has been selected to receive the

2010 National Hurricane Conference Distinguished Service Award.


Butch is a good friend and a National asset and inspiration to thousands.

His decades of service and Duty to others is unsurpassed and it was Butch Loper who befriended me here in 2006 and Im a better man for knowing him and his wife.



Butch Speaking at Loyola University during the portlight.org 2009 NOLA relief Walk.

Member Since: 3 juillet 2005 Posts: 426 Comments: 128654
I don't think anyone is suggesting evacuation in general or the Hawaii evacuation specifically is the wrong thing to do. When, however, emergency operation centers get it wrong too many times and order what proves later to be unnecessary evaluations, human nature kicks in and you get the stayers on the next one. I've seen school canceled for what turned out to be a half inch of rain and watched people ride Hurricane Opal out in their cars because the evacuation order came WAY too late and in the middle of the night. EOC's make the best call they can based on the best information they have. When they say evacuate, it may or may not be the right thing to do but it is always the prudent thing to do.
Member Since: Posts: Comments:
Quoting TampaSpin:
I wonder why the bouy only just over 100nautical miles off shore showed such a strong tsunami. Very strange as if fizzled just before the islands.


Power of prayer, maybe?
Member Since: Posts: Comments:
"Just like when Houston mass-evaced in the face of Rita - but - it proved unnecessary in the end. I bet New Orleans wishes it had pulled a "houston" before Katrina." - P451

-------
I agreed with your entire comment, until this. I happen to live here in NO, as does Patrap. You make it sound like we didn't evacuate. Wrong. There were maybe 25,000 people that hadn't evacuated or gone to shelters when Katrina hit, in a city of 450,000. And we did it in less than 48 hours. Houston WISHES their evac had gone as smoothly as ours.

I'm tired of people perpetuating all the falsehoods about New Orleans, based on a few people.
Member Since: Posts: Comments:
Quoting P451:


This is why they were evacuated. This is why it was proper to evacuate them.

====

Thirty-four years ago, on May 23, 1960, a tsunami destroyed much of downtown Hilo. Tsunami, or seismic sea waves, are generated in several ways, including by large submarine explosive eruptions, by landslides where rock slides into or beneath the sea surface, and by large earthquakes that displace rocks below sea level. The waves generated spread outward in all directions and travel across the oceans at speeds between 425 and 500 miles per hour. Most tsunami that cause widespread damage are produced by large earthquakes that cause fault movements of the sea floor, including the one in 1960. These giant waves wreak their havoc first near to, and then far from, the site of the original earthquake.

The earthquake that caused the 1960 tsunami occurred off the west coast of South America and had a magnitude between 8.25 and 8.5. The waves reached the Hawaiian Islands in about 15 hours. This tsunami caused little damage elsewhere in the islands, but the Hilo Bay area was hard hit. Sixty-one people lost their lives and about 540 homes and businesses were destroyed or severely damaged. The wave heights in Hilo Bay reached 35 feet compared to only 3-17 feet elsewhere. The water washed as far inland as Kilauea Avenue/Keawe Street through the entire present downtown area and to Kekuanaoa Street near Kilauea Avenue.

Link
=========

These are unpredictable events. Had they not evacuated, had the news not headlined the story for hours, and the 1960 event happened again? Everyone would be screaming about why the news didn't report the chance of a tsunami and why weren't the low lying areas evacuated.


People need to wise up about evacuations. It is done because a threat is real. Threats don't always pan out in fact maybe what 1 in 5 or 1 in 10 do? Just taking a stab there.

But the 1...is the 1 that kills. So you evacuate 10 times. 9 times nothing happens. The 1 that does it's a damn good thing people were evacuated.

I'm pretty sure those that remember 1960 would have hoped today's hype existed on that day.



As PAT said, great job by Hawaii. Those who think the evacs were unwarranted or the news coverage was silly - aren't thinking this through - and don't understand what has happened in the past, will happen again, and had a chance to happen today.

You don't take a chance with 100,000 lives. PERIOD.

Just like when Houston mass-evaced in the face of Rita - but - it proved unnecessary in the end. I bet New Orleans wishes it had pulled a "houston" before Katrina.




Very well said, unfortunately its human nature that many that evacuated this time probably wont the next time, i remember in 1992 when Andrew hit S Fl, some people where still thinking it wasn't going to hit even though it was headed straight to us, but since we hadn't been hit for many years since 1965 people somehow forget what can happen. But yes the authorities did a great job in Hawaii.
Member Since: Posts: Comments:
I don't like how the West Coast of the ConUS looks vacant from such a large event. Would there time being coming soon?

Member Since: Posts: Comments:
I wonder why the bouy only just over 100nautical miles off shore showed such a strong tsunami. Very strange as if fizzled just before the islands.
Member Since: Posts: Comments:
Gustav showed the World in 08 that never again will evacuation be willy nillied here.


It was raining Buses and Trains outta here for a full 2 days.

Evacuating for a Tsunami isnt the Days Long event or even weeks for some Hurricanes,but its the right thing to do as History teaches hard lessons,..so anytime one gets da word to skee-dattle.

Do it.

Doing anything"other"is never worth it.
Member Since: 3 juillet 2005 Posts: 426 Comments: 128654

Viewing: 516 - 466

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22Blog Index

Top of Page

About

Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

Local Weather

Clear
67 ° F
Ciel dégagé