Quake & Tsunami Warnings

Last Tuesday, a magnitude 8.8 earthquake struck off the coast of Russia's Kamchatka Peninsula, where the Pacific plate is moving below part of the North American plate. The release of huge amounts of energy pushed ocean water with great force and cause tsunamis(海啸).

This is not the first time this region has seen disaster. In 1952, a 9.0-magnitude earthquake in the same area triggered a very dangerous tsunami. Because of it, when a new earthquake happened, scientists quickly sent tsunami warnings to many places around the Pacific Ocean, including Japan, Russia, Hawaii, the west coast of North America, and even some parts of South America. The goal was to give people enough time to move away from the coast or go to higher ground to stay safe. After the earthquake, experts studied more data to get information about how much energy was released and where the tsunami waves might travel. And that's why there are changes, going from maybe a warning to an advisory (提示) or something different. Luckily, the tsunami waves this time were not destructive, but there were eight-foot waves in parts of California. There were definitely waves in Japan and in Hawaii. Luckily, in a lot of these places they didn't cause serious damage, but, there was structural damage. These waves were not as powerful as those in the 2011 Japan earthquake or the 2004 Indian Ocean tsunami, but they’re still strong enough to sweep a person off their feet or to wipe away a structure. An 8.8-magnitude earthquake is very powerful—it's one of the strongest ever recorded. In 1952, a 9.0-magnitude quake damaged places as far away as Hawaii. Even though 8.8 and 9.0 seem close, the earthquake scale is not simple—the energy difference between them is huge, which may be why this quake's tsunami was smaller. So I think one of the things that we should take away from this is that our warning systems work really well.