A tsunami saved the Greek village of Potidaea from Persian invaders in winter 479 BC, a German study said Thursday, warning that the area remains prone to earthquakes.

New geological evidence suggests that the region could still face tsunami events like the one that drowned hundreds of Persian invaders as they lay siege to the ancient Greek village many centuries ago, according to Klaus Reicherter of Aachen University in Germany and his colleagues.

Sediment on the northern Greek peninsula where Potidaea, and its modern counterpart Nea Potidea, is located showed signs of massive marine events, such as large waves, the study said.

And excavations in the suburbs of the nearby ancient city of Mende uncovered a high-energy level dating back to the fifth century BC that contained far older sea shells likely plucked from the ocean bed and tossed about during a tsunami.

The event was previously described by Greek historian Herodotus.

Reicherter said the study’s findings suggested that the Thermaic Gulf where the peninsula is located — a densely populated area that is also a tourist destination — should be included in Greece’s tsunami-prone regions.

He was due to present his research Thursday at the annual meeting of the Seismological Society of America in San Diego, California. [AFP]

7.4 quake shakes Mexico, 100s of homes damaged
A strong 7.4-magnitude earthquake hit southern Mexico on Tuesday, damaging some 800 homes near the epicenter and swaying tall buildings and spreading fear and panic hundreds of miles away in the capital of Mexico City.

One of the strongest to shake Mexico since the deadly 1985 temblor that killed thousands in Mexico City, Tuesday’s earthquake hit hardest in the border area of southern Oaxaca and Guerrero states. In Guerrero, officials confirmed that some 800 homes had been damaged, with another 60 having collapsed.

Long after the shaking at noon local time (18:02 GMT), there were still no reports of death, even after a less powerful, magnitude-5.1 aftershock was felt in the capital and several other aftershocks near the epicenter in a mountainous rural region. Interior Secretary Alejandro Poire said late Tuesday night that nine people were injured in Oaxaca and two in Mexico City, but no one had died.

Guerrero Gov. Angel Aguirre, who is from Ometepec, was headed there to survey the damage and ordered emergency crews and civil protection to the area to help with the damage. The state did not say how many were displaced.

In Mexico City, frightened workers and residents poured into the streets of the capital. Telephone service was down in the city and throughout the area where the quake was felt and some neighborhoods were without power, according to Mexico City Mayor Marcelo Ebrard, who set up a hotline for people to report damage.

A pedestrian bridge collapsed on an empty transit bus.

About 40 passengers were stranded for a short time on the Mexico City airport air train, but later released. The airport closed for a time but officials said there was no runway damage and they resumed operations.

Mexico City, built on a lakebed, was badly damaged in 1985 when a quake killed at least 10,000 people. That quake was originally measured at 8.1, but is now put by the U.S. Geological Survey at 8.0. In past years, Guerrero has suffered several severe earthquakes, including a 7.9 in 1957 which killed an estimated 68 people, and a 7.4 in 1995 which left three dead.

Tuesday’s quake was the strongest shaking felt in the capital since a magnitude-6.5 earthquake struck also in Guerrero in December. Officials said at least three people died in Guerrero, but there were no reports of widespread damage.

A magnitude-8.0 quake near Manzanillo on Mexico’s central Pacific coast killed 51 people in 1995 and a magintude-7.5 quake killed at least 20 people in the southern state of Oaxaca in 1999.

In Huajuapan, Guerrero, near the epicenter, hotel manager Marco Antonio Estrada also reported shaken-up guests but no major damage. He said it was longest and strongest he ever felt. People ran out of their homes and cars.

The U.S. Geological Survey set the preliminary magnitude of the first quake at 7.4 and said the epicenter was 11 miles underground. The survey set the aftershock at 5.1.

Seismologists and civil protection officials said there didn’t appear to be heavy damage or casualties because of where and how the earthquake hit.

There were reports of damaged buildings but none collapsed on the Oaxaca side of the border, said civil protection spokeswoman Cynthia Tovar said. Authorities believed that the absence of tall buildings in the area is one reason.

Another factor may be the high frequency of earthquakes in the region, said USGS seismologist Susan Hoover.

There have been 15 earthquakes of magnitude 7 or stronger since 1973 within 310 miles (500 kilometers) of Tuesday’s quake. Weaker buildings collapse with each quake, leaving a cadre of stronger ones that can withstand the shaking.

“Another factor to consider is how tested an area has been,” Hoover said.

Also limiting damage was that much less energy was released in Tuesday’s quake than in 1985.

Victor Hugo Espindola Castro, a seismologist with Mexico’s national service, said the difference was of a three-to-one margin.

“Many of the buildings that were damaged in 1985 were poorly constructed and from that came the new building regulations, so that now buildings are stronger,” he said.

March 21, 2012
Associated Press

I am currently training a Charizard in pokemon white. As its level increases daily, I reeeally want it to learn seismic toss. I am playing pokemon white version. How can I get my Charizard to learn Seismic toss in white (TM or Move Tutor)???

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Oh my God, it’s so sad. Imwas on yahoo’s main page and I couldn’t even look at all the pictures. I can’t begin to imagine what they must be going through. Thoughts?

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With all these quakes going on, we need to go ahead and admit there are some tectonic changes going on. Has anyone seen the current status of Yellowstone or any of the other known seismic and volcanic hotspots?

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More than 200 people were killed and hundreds more feared dead on Monday after an earthquake struck parts of southeast Turkey, where rescue teams worked through the night to try to free survivors crying for help from under rubble.
Survivors and emergency service workers searched frantically through mounds of smashed concrete and other debris with shovels and their bare hands after the 7.2 magnitude quake toppled buildings and some roads on Sunday.
Interior Minister Idris Naim Sahin said the quake had killed 120 people in the town and 100 more in the city of Van, some 100 km (60 miles) further south. The toll was expected to rise.
Sahin, who is overseeing emergency operations in Ercis, said 1,090 people had been wounded while hundreds more were unaccounted for.
Rescue efforts were hampered by power outages after the quake brought down power cables to towns and villages across much of the barren Anatolian steppe near the Iranian border.
As dawn broke the scale of devastation was clear.
Prime Minister Tayyip Erdogan said there were an unknown number of people unaccounted for under the collapsed buildings of the stricken towns, and he feared the worst for villagers living in outlying rural areas, who had yet to be reached.
“Because the buildings are made of adobe, they are more vulnerable to quakes. I must say that almost all buildings in such villages are destroyed,” Erdogan told a televised news conference in Van on Monday shortly after midnight.
More than 100 aftershocks have jolted the region in the hours since the quake struck for around 25 seconds at 1041 GMT (6:41 a.m. EDT) on Sunday.
U.N Secretary General Ban Ki-moon said he was deeply saddened by the loss of life and devastation. “He expresses his heartfelt sympathies to the government and people of Turkey at this time of loss and suffering,” the United Nations said in a statement.
In Van, a bustling and ancient city on a lake ringed by snow-capped mountains and with a population of one million, cranes shifted rubble off a collapsed six-storey apartment block where bystanders said 70 people were trapped.
Erdogan visited Ercis earlier by helicopter to assess first hand the scale of the disaster. With 55 buildings flattened, including a student dormitory, the level of destruction in Ercis, a town of 100,000, was greater than in Van.
“We don’t know how many people are in the ruins of collapsed buildings, it would be wrong to give a number,” he said.
Newspapers said trauma had been piled on trauma in southeast Turkey. Kurdish militants killed 24 Turkish soldiers in an attack last week in Hakkari, south of Van.
“Homeland of Pain. Yesterday terrorism, today earthquake,” said Radikal newspaper.
The Red Crescent said a team of about 100 expert personnel had arrived at the earthquake zone to coordinate operations. Some 4,000 tents and 11,000 blankets, stoves and food were being distributed to help fight off the cold.
At Van airport, a large Turkish Airlines cargo plane was offloading aid materials, which military vehicles were waiting to transport to the quake zone.
A tent city was being set up at the Ercis sports stadium. Access to the region was made more difficult as the earthquake caused the partial collapse of the main road between Van and Ercis, broadcaster CNN Turk reported.
Soldiers were deployed in Ercis to help rescuers and digging machines had also arrived to help. There was a constant wail of ambulance sirens ferrying the injured to hospitals.
Dogan news agency reported that 24 people were pulled from the rubble alive in the two hours after midnight.
One nurse told CNN Turk news channel the town’s hospital was so badly damaged that staff were treating injured in the garden, and bodies were being left outside the building,
After visiting the quake zone, Erdogan returned to Ankara, where he is expected to chair a cabinet meeting to discuss the response to the disaster.
He said Turkey was able to meet the challenge itself, but thanked countries offering help, including Armenia and Israel, two governments that have strained relations with Ankara.

October 24, 2011
Reuters

The devastating 2004 Indonesian tsunami, with its death toll of as many as 250,000 people, was caused by the first magnitude-9.0 earthquake since 1967. A succession of smaller but still destructive tremors in Haiti, Chile, and New Zealand — surpassed by this year’s magnitude-9.0 quake in Japan — has some researchers wondering whether the number of large earthquakes is on the rise.

June 13 2011
Short Review

Christchurch was hit with aftershocks on June 13, as a series of tremors rocked New Zealand’s second- biggest city.

According to the RMS Reactions Catastrophe Centre, a 5.2 (body wave) magnitude earthquake struck at 01:00 UTC, and was followed by a stronger 6.0 (moment) magnitude earthquake within an hour and a half.

A further earthquake, of 4.6 (body wave) magnitude, struck at 02:40 UTC. According to reports, this resulted in a temporary closure of the airport followed by power outage to up to 56,000 users in addition to flooding and liquefaction.

like Gravity, Magnetic etc….

since the interpretation of Seismic is also difficult, more complex then others. Gravity, Magnetic methods are easy to evaluate on the other hand…
If we have to use SEISMIC, what are justification to its importance on others??

Thanks!

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They had said the Easter earthquake in Mexico relived pressure on the San Andreas Fault. Now they just came out with a new study saying it is "Locked and loaded" and is overdue for a very large quake. Which is correct?

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So, I get a high-pitched ring in my right ear, and only my right ear never the left, there’s always an earthquake within the next 24 hours. The longer it lasts, the higher the magnitude. It only rings when there’s gonna be one with a magnitude of 5.0+
My ear rang 5 times yesterday. The times were;
3: 37 a.m. (This one was the longest out of all of them)
8: 55 a.m.
9: 23 a.m.
12: 11 a.m.
5: 19 p.m.
I looked up recent earthquakes, and found this site. http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/quakes_big.php

There were 5 earthquakes!
This has been going on for about 5 years now, I’m 13.
Has anyone else had this happen?
Anyone have and idea as to why it does this??
Me and my brother’s crack up about it and say I’m a catfish! Hahaha!!!!:)
LOL Superficialidade (Sorry if mispelled!!!!)

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In regards to a seismograph’s location, does the p-s interval get larger or smaller with the increasing distance from the epicenter?

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a. epicenter – the surface location of an earthquake
b. fault – a fracture in the crust along which movement has occurred
c. hypocenter – the underground point of origin of a quake
d. tsunami – an underwater earthquake

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When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 10.5 km/s and the secondary, or S, wave has a speed of about 5.5 km/s. A seismograph, located some distance away, records the arrival of the P wave and then, 140 s later, records the arrival of the S wave. Assuming that the waves travel in a straight line, how far is the seismograph from the earthquake?

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For geography homework I have to make Dominoes of Richter Scale to Seismograph. In other words I’m making it so one side of it will be a Richter measurement and the other will be the same in Seismic measurement, but I cannot find anything showing this (E.G. 6.0 On the Richter scale = Whatever on the Seismograph) someone give me a link or some help?

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well on yahoo, it says "Storm clouds create dramatic sight

Severe thunderstorms and tornadoes are the subject of amazing images taken around the world."

all over the world? whoa.

also, those earthquakes in Chili and Haiti? apparently there were like over 10 more that they didn’t even bother mentioning that happened within the same year all about a 7.0 or higher on the Richter scale.

i know theres a bad economy right now but this is a VERY messed up movie that probably shouldn’t have been made… http://blog.movies.yahoo.com/blog/201-christmas-favorite-nutcracker-gone-horribly-wrong

north korea might start a nuclear war… uh oh?

"N. Korea tensions, collapse plans revealed
Among other surprises, leaks show the regime’s ties to close ally China are not what the world thought"

http://news.yahoo.com/s/ap/as_china_nkorea_wikileaks

theres a new space/technology race that is making everyone go insane with "inventive technology sciencyness"

http://news.yahoo.com/s/afp/20101130/sc_afp/unclimatewarminguschina

and pretty much the mayan calender is not the only one that ends in 2012.

a bunch of other ones including a chinese version were also found to end in 2012.

how did they all copy off of each other?

im not saying 2012 is the end because alot of times people have said that "oh its Y2k just because its 2000 its going to explode" thats just illogical…

2012 is the only end of the world scenario with actual scientific evidence that some really weird stuff is going to happen and earth is going to be in a very weird place in 2012, or something like that.

so im just wondering… is 2012 the end of the world? any info?
thats an interesting way to put it, but im talking about some solid*well, "evidence-ish" that is hinting at unusual stuff happening to the world and its inhabitants.
wow kyle you have no rhythm… LOL

but hey, how do you KNOW what im talking about? the answer: u dont.

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After a widely reported earthquake in California, many people call their insurance company to apply for earthquake insurance. Might this reaction reflect some deviation from rationality? Discuss.

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im doing a haiti project but i’m not sure what fault line haiti is on. or if its even on a fault line? extremely confused :/

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But in the article there is a picture of her standing up on an RNC podium

http://news.yahoo.com/s/yblog_upshot/20101031/el_yblog_upshot/palin-you-blew-it-president-obama

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I need this for a project. How do cities prepare and protect against earthquakes? Not an individual, cities. For example, shock absobers, or things that lessen damage, or help to see it coming.

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i get that like they detect vibrations but do scientist set up sensors around the earth? how else could the machine detect earthquakes all over the world?

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In which direction do the three different seismic waves travel?

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if the "BIG ONE" strike in APRIL OR MAY (that what i heard) will it be worst to live right on the san andreas fault? should i do something before it strike CALIFORNIA im really scared like out of my mind my family planning to leave California for good next month but im not sure i hear once it strike California is gonna become an ocean…..-.- well half of California….. what should i do? any advice for my safety and other?

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like a 6.5 magnitude

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tsunami warning with it…. are you folks who are nearby or on shorelines getting out , NOW????>…. please do…..

http://earthquake.usgs.gov/earthquakes/recenteqsww/

http://www.msnbc.msn.com/id/39831929/ns/world_news-asiapacific/

report not considering the tsunami, if one is generated, to be too dangerous…. ok…. sorry… you don’t have to run for the hills…. but… I’d stay aware, anyway…..can’t be too careful, right?…..
still, there WAS a tsunami… people were lost…. the warning should have remained….very sad….

Technorati Tags: asiapacific, earthquake, earthquakes, msnbc, shorelines, Tsunami

A) The epicenter is calculated after the all the aftershocks of an earthquake are plotted. It is the statistical center of the earthquake. The focus is the spot of first motion of the rocks.
B) The epicenter is where the energy is first released and the focus of the earthquake is where most of the damage is done
C) The focus of the earthquake is were surface waves are first detected while the epicenter is where the P and S waves are detected.
D) The epicenter is the spot on the Earth’s surface directly above the focus.

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a. hypocenter theory
b. elastic rebound theory
c. strain and stress theory
d. seismic theory

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Has anyone heard of the earthquake that happened in New Zealand in early September? Does anyone have any news as to the progress of the city? Has the government put aside anymore money to help out the economy?

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