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Frequently Asked Questions

What should I do during an earthquake?

Riverside County Fire Department - Frequently Asked Question...
If you are indoors, stay there. Get under a desk or table, or crouch down along an inside wall or hallway. If you are outdoors, get into an open area away from trees, buildings, walls and power lines. If you are driving, pull your car to the side of the road and stop. Avoid overpasses or power lines. Remain inside until shaking is over. If you are in a highrise building, stay away from windows and outside walls. Get under a table. Do not use elevators.
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Concord Earthquake Preparedness
When you feel an earthquake, DUCK under a desk or sturdy table or stand in a corner. Stay away from windows, bookcases, file cabinets, heavy mirrors, hanging plants, and other heavy objects that could fall. Watch out for falling plaster or ceiling tiles. Stay under COVER until the shaking stops. HOLD onto the desk or table. If it moves, move with it.
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What is an earthquake?

Earthquake Earthquake Information; FAQ
earthquake is the trembling or shaking of the ground that we feel when pieces of the earth's crust push against each other hard enough to overcome friction andi begin to slip . Because these pieces are so huge, the size of cities or states or countries, the energy released when they slip a little can be enough to shake apart buildings and other structures. This is especially so if the structure wasn't built or re-built (retrofit) specifically to withstand violent shaking.
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FAQ
A natural shaking of the ground caused by sudden slippage on a fault line. Seismic waves spread outward from the fault rupture much like ripples do in a quiet pond when a stone is thrown into it.
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What should I do before, during and after an earthquake?

DepremPark
In regard to that you can visit Deprempark the structure of the Institute for Earthquake Research in Kandilli Observatory, Bosphorous university. At the same time you can visit the page www.ahep.org to get detailed information.
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Earthquake FAQ - UTIG
Earthquakes occur when stresses in the earth reach a level greater than the strength of the rock, causing the rocks on opposite sides of the fault to suddenly and violently slip past one another. Stresses acting perpendicular to the fault push the rocks on either side of the fault together. The strength of a fault is related to the size of these stresses and the coefficient of friction of the material forming the fault.
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How can I prepare for an earthquake?

Concord Earthquake Preparedness
Check chimneys, roofs, and wall foundations for stability. Make sure that your home is bolted to its foundation. Call a licensed contractor if there are any questions. Secure bookcases, shelves, pictures, heavy furniture and equipment to walls or surface areas in order that they not fall on you or block access to exits. Secure your hot water heater to a wall -- it's a valuable source of stored water. Apply these principals at work too, as best you can.
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How long can we expect an earthquake to last?

Concord Earthquake Preparedness
The shaking will last only a minute or two. But, there probably will be a number of aftershocks (over several days/weeks/months lasting a minute or two each).
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What caused the iceberg to break off? Was there an earthquake or what caused the fissure?

Iceberg FAQ's
I'd like to find out whether there are, in fact, other factors involved besides global warming and, if so, how much of an influence these other factors might be in what takes place and in what you predict might take place. The primary factor in iceberg generation is that it is a part of the hydrological cycle. Snow (and not that much) falls on the steep and high continent of Antarctica.
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What other sensors besides accelerometers are used to measure earthquake motion?

California Geological Survey - Frequently Asked Questions
The most common sensor is not the accelerometer, which measures acceleration, but the seismometer, which measures the velocity or speed of a point on the ground as it moves during earthquake shaking. Most velocity sensors are high precision, sensitive instruments designed to record motions from distant earthquakes rather than the strong shaking that occurs near to earthquakes.
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What was the biggest earthquake ever recorded?

Frequently Asked Questions
Alaska: Major tsunamis were generated along the Alaskan coast in 1946, 1957, 1958, 1964, and 1965. Many other locally generated tsunamis occurred prior to those dates. US West Coast: Tsunamis were generated locally in 1812, 1873, 1878, 1927, 1930, 1946 and 1949. The west coast was also impacted by tsunamis generated in other regions in 1877, 1946, 1952, 1957, 1960, 1964, and 1975. See http://wcatwc.arh.noaa.gov/web_tsus/pastaor_tsunamis.htm for more information on west coast tsunamis.
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Do I need earthquake coverage? How can I get it?

Oliver Insurance - Frequently Asked Questions
The standard insurance policy does not pay for direct damages caused by "earth movement." "Earth movement" is a much broader term than earthquake. It includes earthquake, volcanic activity and other earth movement. This coverage may be available by endorsement for an additional charge. If you live in an area that is more likely to have an earthquake, you'll pay more than if you live in an area that is unlikely to have an earthquake.
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Is there "earthquake weather"?

Earthquake Earthquake Information; FAQ
No. Earthquakes happen all year round, night and day, rainy or clear, hot or cold. They have no weather or seasonal preference.
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How do I find out about earthquake faults?

Welcome to Solano County
Earthquake fault zone maps are on file in the Planning Services Division and are available for public review.
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What causes an earthquake?

Outdoor Hazards - Earthquakes
According to now generally accepted theory of plate tectonics, the earth's crust is divided into several major plates, some 50 miles thick, which move slowly and continuously over the interior of the earth. Earthquakes are initiated when, due to slowly accumulating pressure, the ground slips abruptly along a geological fault plane on or near a plate boundary. The resulting waves of vibration within the earth create ground motion at the surface that vibrates in a very complex manner.
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What are an earthquake's characteristics?

Outdoor Hazards - Earthquakes
Once the sudden rupture occurs, the earth begins to shake. This shaking is caused by a series of waves known as seismic waves moving from the center of the earthquake out to other parts of the earth. The type of waves involved in an earthquake is a key characteristic of the phenomenon. The four types of seismic waves are grouped into two main categories according to the way they travel from the source, or focus, of an earthquake. P waves and S waves are "body" waves.
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What is an earthquake cult?

plume - faq
earthquake cult is usually some religious group who wants to give me pamphlets or books or magazines about their religion. The rumour that "earth quake cult" is just another term for Iehova's witnesses is completely unfounded. Probably. Common earthquake cult beliefs include the fact that trees live longer than people because they're more spiritual and the fact that all good is caused by god while all evil is man's own responsibility.
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What is the intensity of an earthquake?

DepremPark
The effect of the earthquake on the earth is defined by the intensity of it. In seismology a scale of seismic intensity is a way of measuring or rating the effects of an earthquake at different sites. The Modified Mercalli Intensity Scale is commonly used in the United States by seismologists seeking information on the severity of earthquake effects. Intensity ratings are expressed as Roman numerals between I at the low end and XII at the high end.
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What is earthquake magnitude?

Earthquake FAQ - UTIG
Earthquakes vary broadly in size; from microscopic fractures to slip occurring on a fault hundreds of kilometers long. Earthquakes also vary in location and depth. Individuals would probably notice a small earthquake occurring a kilometer below the surface, but a larger earthquake occurring several hundred kilometers below your feet may not be noticed at all.
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What is earthquake moment?

Earthquake FAQ - UTIG
Earthquake moment, or seismic moment M0 is perhaps the most fundamental parameter we can use to measure the strength of an earthquake. While magnitudes are a convenient measure of earthquake size determined directly from one seismogram, M0 is a more physically meaningful measurement of earthquake size not subject to many of the problems that plague magnitudes. In fact, M0 is directly related to the fundamental parameters of the faulting process.
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What is earthquake intensity?

Earthquake FAQ - UTIG
Scientists and engineers often describe the effects of ground shaking on humans and man made structures in terms of earthquake intensity. Earthquake intensity is judged on the Modified Mercalli scale and is, by definition, subjective, since it doesn't depend on instrumental measurements, but instead on the observer's assessment of damage or shaking. A level III intensity indicates rattling doors and windows, broken dishes, and cracked plaster.
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What was the most deadly earthquake ever?

Texas Earthquakes - UTIG
The 27 July 1976 earthquake in Tangshan, China (MS = 7.9) caused the greatest number of deaths of any recent quake known; the most reliable estimates are that about 242,000 lives were lost. Tangshan had a pre-quake population of about a million people; the main industry is mining. One reason the death toll was so high is because most of the structures in Tangshan were multiple-story, unreinforced brick and concrete buildings.
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Where can I find information regarding Earthquake Safety and Earthquake Gas Shutoff Valves?

SoCalGas - Frequently Asked Questions
Visit our Web pages What to Do in Case of an Earthquake and Earthquake Shutoff Valve where you'll find a list of earthquake safety tips, as well as lots of information to help you evaluate, choose and install an earthquake gas shutoff valve.
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What do scientists do after an earthquake?

Frequently Asked Questions (FAQ) Page
What is an "earthquake"? An earthquake occurs when rocks break and slip along a fault in the earth. Energy is released during an earthquake in several forms, including as movement along the fault, as heat, and as seismic waves that radiate out from the "source" in all directions and cause the ground to shake, sometimes hundreds of kilometers away.
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