I only know that Richter scale 3 will shake 0.1 mm at a distance of 100 kilometer. It increases by ten fold for each Richter scale magnitude. Give example how it will vary according the distance of epicenter. They say it is Inverse Square of the distance. Please explain with a model calculation. If an earthquake is measured from a distance of 2000 kilometers from epicenter and if the magnitude is 9 in Richter scale what will be the maximum shaking. Will the S wave pass through sea water.?

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An earthquake measuring 7 on the Richter scale releases about how many times more energy than an earthquake with a magnitude of 6?

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What is the amplitude (in mm) registered on a standard seismograph (same as that used by Charles Richter) of a Magnitude 5 earthquake at 200km?

I don’t even know where to start with this problem D:

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If the LA earthquake had a magnitude of 6.5 on the Richter scale and the magnitude of the San Francisco earthquake had a magnitude 35 times as intense as the LA earthquake, what is the magnitude of the San Francisco earthquake?

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because there are so many formulas, i dont know which one is the known official one.

is it MAGNITUDE=log(intensity/intensity of standard earthquake)?
if it is, what is a standard earthquake?

thx pls help! math pw P

Technorati Tags: earthquake, intensity, magnitude, math

USGS Reports
Magnitude 6.9 SOUTHERN QINGHAI, CHINA April 13, 2010
•Magnitude 6.3 SPAIN April 11, 2010
•Magnitude 6.8 SOLOMON ISLANDS April 11, 2010
•Magnitude 7.7 NORTHERN SUMATRA, INDONESIA April 06, 2010
•Magnitude 7.2 BAJA CALIFORNIA, MEXICO April 04, 2010
•Magnitude 4.4 GREATER LOS ANGELES AREA, CALIFORNIA March 16, 2010
•Magnitude 6.7 OFFSHORE BIO-BIO, CHILE March 16, 2010
•Magnitude 6.5 NEAR THE EAST COAST OF HONSHU, JAPAN March 14, 2010
•Magnitude 6.9 LIBERTADOR O HIGGINS, CHILE March 11, 2010
•Magnitude 6.1 EASTERN TURKEY March 08, 2010
•Magnitude 6.8 SOUTHERN SUMATRA, INDONESIA March 05, 2010
•Magnitude 6.6 OFFSHORE BIO-BIO, CHILE March 05, 2010
•Magnitude 8.8 OFFSHORE MAULE, CHILE February 27, 2010
•Magnitude 7.0 RYUKYU ISLANDS, JAPAN February 26, 2010
•Magnitude 6.9 CHINA-RUSSIA-NORTH KOREA BORDER REGION February 18, 2010
•Magnitude 3.8 ILLINOIS February 10, 2010
•Magnitude 5.9 OFFSHORE NORTHERN CALIFORNIA February 04, 2010
•Magnitude 6.2 BOUGAINVILLE REGION, PAPUA NEW GUINEA February 01, 2010
•Magnitude 5.9 HAITI REGION January 20, 2010
•Magnitude 4.0 OKLAHOMA January 15, 2010
•Magnitude 7.0 HAITI REGION January 12, 2010
•Magnitude 6.5 OFFSHORE NORTHERN CALIFORNIA January 10, 2010
•Magnitude 4.1 SAN FRANCISCO BAY AREA, CALIFORNIA January 07, 2010
•Magnitude 6.8 SOLOMON ISLANDS January 05, 2010
•Magnitude 7.1 SOLOMON ISLANDS January 03, 2010
•Magnitude 6.6 SOLOMON ISLANDS January 03, 2010

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I understand why so many people die in the Haiti earthquake but why were they so many few deaths compared to Haiti in the Loma Prieta earthquake which also was a similar magnitude (6.9)? What made the Loma Prieta earthquake kill only around 100 people? Was it the buildings, roads, speed of rescue? Any answers would be great.
Thank you very much, building standards. Great, thank you. More answers are welcome, the more the better.

Technorati Tags: deaths, haiti, loma prieta earthquake, magnitude

i just had a dream of two earthquakes of 8.0+ Magnitude in the US, it was on the map of USGS and it was in Taxes and new mexico, why am i seeing this? >:|, everything i ‘feel, see or hear’ comes True
do you think this might happen sometime Later in the years??
im only 15 and im scared

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How big was the magnitude of it?

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Okay, there have been a lot of earthquakes recently: a small on in Chicago, the one in Haiti, one in Chile, one in Mexico and one near Tibet, and now there’s volcanic activity in Iceland, which is basically a little chunk of land on a fault line. All of the earthquakes except for the 2.5 one in
Chicago have been above 7.0 in magnitude. Does this mean something’s going on with the earth’s crust?

Technorati Tags: chile, chunk, earth, earthquakes, fault line, haiti, magnitude, mexico, tibet, volcanic activity

My family and friends have been hit hard because of the 2010 baja california earthquake. The magnitude was greater than the Haiti earthquake. Although the death toll doesnt compare at all, the damage done is unbelievable. Most of my family members live in Ejido Oaxaca, Mexico, which was right next to the Epicenter. I want to setup a website so people can donate money which can be helpful for Food and water. We have had a couple of phone calls to them and they said that the gallon of water has sky rocketed in the local markets to 60 pesos which is about 6 dollars. People dont have this kind of money so they need our help…

so far i have created this blog.

http://2010earthquakerelief.blogspot.com/

but now how do i make it so that people can see it and make a donation?..

Technorati Tags: baja california, blog, california earthquake, death toll, epicenter, family and friends, family members, haiti, local markets, magnitude, money, oaxaca mexico, setup a website, sky

My family and friends have been hit hard because of the 2010 baja california earthquake. The magnitude was greater than the Haiti earthquake. Although the death toll doesnt compare at all, the damage done is unbelievable. Most of my family members live in Ejido Oaxaca, Mexico, which was right next to the Epicenter. I want to setup a website so people can donate money which can be helpful for Food and water. We have had a couple of phone calls to them and they said that the gallon of water has sky rocketed in the local markets to 60 pesos which is about 6 dollars. People dont have this kind of money so they need our help…

so far i have created this blog.

http://2010earthquakerelief.blogspot.com/

but now how do i make it so that people can see it and make a donation?..

Technorati Tags: baja california, blog, california earthquake, death toll, epicenter, family and friends, family members, haiti, local markets, magnitude, money, oaxaca mexico, setup a website, sky

I live in Southern Cali, and I’ve only experienced a 6.2 and a 4 magnitude, and all of these recent ones have made me a bit worried.. What damage would "the big one" bring? Or what could it bring?

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If you haven’t heard, there was an earthquake in China with a 6.9 magnitude.
There were reported three aftershocks recorded at 5.3, 5.2, and 5.8 (according to USGS).

Let’s hope that the majority of the ones stuck under rubble will be able to be saved.

Let’s pray for their safety too.
What do you think of this drastic earthquake?
Spyro: Are you saying that 67 people dead isn’t enough to recognize a catastrophe? Besides the 67 dead, there are countless stuck under rubble. Even if you don’t believe in God, you could show some respect for the people that have died.

Technorati Tags: aftershocks, catastrophe, earthquake in china, god, magnitude, rubble

I just recieved a txt saying there would be an earthquake (8.6 magnitude) in California withing the next 48 hours. Can an earthquake even be predicted? I’ve been looking for info in the interned to see if this is true, but apparently it isn’t because i can’t find any news.

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if you go on this website you see that there are earthquakes every day

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

a lot of them are magnitude > 7
why are only some devastating?

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The poster is to show some of California’s resources as well as some of the natural hazards that exist in the state. The poster must be free standing, it must be able to stand on a table without falling down. The central portion should have a map of California where resources and hazards are located. On one side of the map resources should be discussed, hazards on the other.

Hazards–San Andreas fault, Garlock fault, active volcanoes with time of last eruption, where subduction is occurring, location of earthquakes with magnitude of 7 or greater since 1900. Discussion of hazards should include any major damage done or loss of human life.

Resources—5 main mineral resources (locate any major areas of mining), 5 main agricultural crops (locate any major areas of cultivation), location of major oil fields, location of geothermal energy plants, desalination plants, major wind farms, major solar energy facilities. Discussion of resources should include quantities of production and dollar values, and environmental problems that have arisen from such activities as mining and agriculture.

Additional—nuclear power plants, major aqueducts.

Show on the map where these things are, use the rest of the poster to discuss and illustrate what you have learned.

i need help with this i have no ideaaa what to do???????????

please help with any information pictures anything helppp me please any help will be great

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I know we have always had earthquakes in one place or another but now they are happening closer together and the magnitude of them are getting stronger and stronger. We have also had thousands of earthquakes but they were relatively small and not noticeable.

Now, today there was another one in Indonesia at 7.8. So we have had big ones in Haiti, Japan, Turkey and Baja, CA all this year and we are only in the month of April.

Your thoughts please. I would really like to hear what you guys have to say. Thanks.

Technorati Tags: baja ca, earthquakes, haiti, indonesia, japan, magnitude, month of april, turkey

okay so they been saying theres going to b an earthquake in california cuz we been expecting one. what would be the magnitude of it??? how dangerous would it be?

most importantly what are the things i need to get to b prepared?
AND how can i keep my pets safe?[cat and dog]

Technorati Tags: earthquake in california, magnitude, pets

First Haiti, then Guatemala, then Chile, now California:

An earthquake rumbled early Saturday off the northern California coast and dozens of people in Humboldt County reported feeling it, the U.S. Geological Survey said.

The 4.6-magnitude temblor hit at 12:46 a.m. and was centered in the Pacific Ocean about 30 miles west of Ferndale.

USGS geophysicist Randy Baldwin said the temblor was lightly felt in area cities such as Eureka and Ferndale but wasn’t strong enough to cause damage.

"Ferndale felt it the most," he said.http://www.latimes.com/news/local/la-mew-earthquake-northern-california6-2010mar06,0,5397081.story?track=rss

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There was just a 6.6 in Japan a while ago. I know earthquakes are happening around us all the time but why all these large ones almost every week? I guess I’m not old enough to remember this many large magnitude ones all over the globe in just a few months.

Also, do you think the New Madrid fault could be triggered by all the others?

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We all no the devastating earthquakes i just need 2 know what the magnitude was? plus poll: where do u think the next earthquake will hit?

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Here is a quote from an article regarding the quake in Italy (L’Aquilla).

"The U.S. Geological Survey said the big quake was magnitude 6.3, but Italy’s National Institute of Geophysics put it at 5.8 and more than a dozen aftershocks followed."

I know that the Richter scale is logarithmic, so this difference is actually substantial. Do estimates normally vary this much?
Are you saying that it is different because one measurement was made on the N. American plate and the other made on the European plate?

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From the pictures that I have seen, it seems that Haiti is more devastated than Chile yet it has a lesser magnitude

Technorati Tags: chile, haiti, magnitude

(2/27/10)…Pat Robertson today argued that the 8.8 magnitude of the earthquake that struck Chile early this morning should serve as a warning to the population that “God is even angrier with them than he is with the people of Haiti.”

So is he better as
…an evangelist
…a seismologist
…a new hybrid of evangelism and seismology?

http://open.salon.com/blog/the_desperate_blogger/2010/02/27/robertson_god_even_angrier_with_chile_than_haiti

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They say it’s a big one around 11.7 magnitude, what do you all think?

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i need all the earhquakes that hit the united states with a Magnitude of 5.0 or higher.

thanx if you can help me

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I need to solve a math question!!! Can anyone help me??
The question is: Determine the Ricter magnitude if the following energy was released by the earthquake. a) 2.5 mega joules. Please show all work.

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(CNN) — An early morning earthquake rattled northern Illinois on Wednesday, shaking an area about 50 miles west-northwest of downtown Chicago, the U.S. Geological Survey said.

The quake was originally reported as having a magnitude of 4.3, but the USGS later downgraded it to magnitude 3.8. It hit just before 4 a.m. CT (5 a.m. ET), with an epicenter about 3 miles underground. The USGS pinpointed the quake between the towns of Virgil and Sycamore, Illinois.http://www.cnn.com/2010/US/02/10/illinois.earthquake/index.html?section=cnn_latest

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I really need to understand this:

What is the magnitude of an earthquake that is 3.7 times as strong as another earthquake that measures 5.2 on the Richter scale?

Thanks in advance!

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