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2011 Tōhoku earthquake and tsunami
|Local date||11 March 2011|
|Local time||14:46 JST|
The magnitude 6.9 or 7.0 earthquake struck at a depth of 54.0 kilometers (33.6 mi) to 60 kilometers (37 mi)….March 2021 Miyagi earthquake.
|Magnitude||7.0 Mw (USGS) 6.9 MJMA (JMA)|
|Depth||43.0 km (USGS) 60.0 km (JMA)|
Earthquake Rattles Japan’s Northeast A 7.2-magnitude earthquake shook northeastern Japan on Saturday evening, prompting a tsunami warning that was quickly lifted. The quake, which hit just after 6 p.m., lasted for over 30 seconds and could be felt strongly in Tokyo, hundreds of miles from the epicenter.
As of Sunday morning, no deaths had been reported from the quake, Prime Minister Yoshihide Suga said. Japan’s meteorological service reported the quake’s magnitude as 7.3, up from the initial assessment of 7.1, but said there was no danger of a tsunami.
The largest earthquake in Japan: today: 4.4 in Naze, Kagoshima, Japan. this week: 5.0 in Miyazaki, Miyazaki, Japan. this month: 5.3 in Shimo-furano, Hokkaido, Japan. this year: 7.1 in Namie, Fukushima, Japan.
Earthquakes are also classified in categories ranging from minor to great, depending on their magnitude….
|Magnitude||Earthquake Effects||Estimated Number Each Year|
|7.0 to 7.9||Major earthquake. Serious damage.||20|
|8.0 or greater||Great earthquake. Can totally destroy communities near the epicenter.||One every 5 to 10 years|
GETTY A light earthquake is measured at between 4 and 4.9 on the Richter scale. Like minor quakes, they occur often worldwide, can be felt but generally cause no damage. A 4.5-magnitude earthquake struck Hawaii on March 11, 2011, as residents braced for a tsunami after a massive earthquake in Japan.
A magnitude 4.0 eastern U.S. earthquake typically can be felt at many places as far as 60 miles from where it occurred, and it infrequently causes damage near its source. A magnitude 5.5 eastern U.S. earthquake usually can be felt as far as 300 miles from where it occurred, and sometimes causes damage out to 25 miles.
Though there is no way to pinpoint the exact arrival of an earthquake, scientists can examine sediment samples to get an idea of when major earthquakes occurred in the past. By measuring the amount of time between events, they can come up with a rough idea of when a major quake might hit.
Elephants can also show unusual movement patterns before earthquakes. Elephants can also show unusual movement patterns before earthquakes. In this way, the researchers discovered unusual behavioural patterns up to 20 hours before an earthquake.
Don’t run outside. Trying to run in an earthquake is dangerous, as the ground is moving and you can easily fall or be injured by debris or glass. Running outside is especially dangerous, as glass, bricks, or other building components may be falling. Again, you are much safer to stay inside and get under a table.