Earthquakes often happen on this earth. Not long ago, a 6.5-magnitude earthquake occurred in Taiwan Province, our country, and the number of aftershocks was very terrible. Even the fish in the sea were crazy about rushing out of the water. There was also an earthquake in Mexico. On September 19, a strong earthquake occurred in Mexico. The magnitude measured by the State Seismological Bureau was 7.4, and then it was updated to 7.7. You should know that 7.7 is a very large earthquake. Under such an earthquake, it is likely to trigger a tsunami. Only this Mexican earthquake, its epicentre is located 63km south of Coman, Coard, Michoacan, and its focal depth is15km. Then the question is, why did the earthquake cause a tsunami?

There are still many reasons for the tsunami caused by the earthquake. For example, when the earthquake occurred, the seabed strata broke.

The fracture of seabed strata will cause some strata to rise or sink suddenly, and waves often occur. If the seabed strata rise suddenly and violently, it will cause a huge wave, which is called tsunami. Moreover, it is not as simple as a wave, but many waves will occur, because the whole sea and water level will be violently shaken, which is not quite the same as the waves we usually see. It is a huge wave, and sometimes it will even lift 1~5 meters high waves.

A tsunami can only be triggered by an earthquake with a magnitude of 6.5 or above.

However, tsunamis can't be triggered every time. It all depends on the probability. It depends on whether there is an effect on the seabed strata when an earthquake occurs in this area. If there is an effect on the seabed strata, the probability of a tsunami will be great. Take the 7.7-magnitude earthquake in Mexico as an example, the probability of a tsunami is quite high. If there is a tsunami, then this tsunami will be an unprecedented height, and Mexico has also launched a tsunami warning. At this time, people are even more flustered and take refuge quickly. In fact, this is also the most correct way.