Does the earthquake itself cause an earthquake?

Each year, there will be more than 50,000 times around the world because people can feel rather strongly felt earthquake. Scientists used to think that these earthquakes occurred independently and that an earthquake did not cause other earthquakes. But scientists are now beginning to find connections between earthquakes and earthquakes that may trigger other earthquakes. Some earthquakes seem to trigger earthquakes beyond a certain distance. When the fault is shifted and an earthquake occurs, the force that displaces the fault does not always disappear as we understand it. They may move along the fault and then cause another earthquake in another place.

Pull off the fault

If earthquakes happen once and again, along the fault, as if a row of dominoes fell in sequence, we seem to define such an earthquake as an "earthquake storm." An earthquake storm can last long. The most typical case of earthquake storm to the earthquake in Turkey, since 1939, the North Anatolian fault in Turkey (North Anatolion Fault) earthquakes continue to occur, earthquake sequence followed by the distribution from east to west.

Important structural maps in Turkey

Today, some scientists believe that shock waves from strong earthquakes can also shake distant faults, which is enough to make the fault begin to move. The first clue to prove that this phenomenon may be taking place came from a strong earthquake in 1992 that struck southern California. The earthquake was located in Landers and reached a magnitude of 7.5 . It was the strongest earthquake that struck the area in half a century. As seismic waves spread across the area, more earthquakes were recorded throughout the western United States. These earthquakes occurred as early as a few minutes after the earthquake in Landers, and later at several months later.

The Landes 7.5 earthquake in 1992

According to current research by the California Institute of Technology and the US Geological Survey, the Landers earthquake demonstrated that "a huge earthquake" can cause "inductive" earthquakes that are hundreds of miles away.

Remote trigger

There is also a clue than 1,000 small earthquakes occurred in 2002, that year's October 23, a 7.3 earthquake struck Alaska, then, Wyoming, Yellowstone National Park, Alaska than 3000 km away, and yet there It is monitored. Although Yellowstone National Park is a long way from Alaska, scientists suspect that there is a triggering relationship between the earthquakes in the two places, so they began to seek evidence of such remote effects.

The scientists studied the Yellowstone National Geopark. After the strong earthquake in Alaska, more than 1,000 small earthquakes occurred in the underground area of ​​the park . It was also discovered that the park's intermittent fountain also changed its characteristics. For example, some fountains erupted even more. For intensive, some fountains have a maximum temperature increase of up to two times.

Geothermal Geyser at Yellowstone National Geopark

Scientists tend to believe that the Alaska earthquake triggered remote earthquake swarms in the Yellowstone National Geopark more than 3,000 kilometers away.

The information in this article comes from the Internet and was reorganized and edited by China Rescue Equipment Network.