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Japan is near a very active fault zone where earthquakes and volcanoes occur often. On March 11, 2011 alone, there were 200+ aftershocks. From the 9.0 magnitude earthquake on Friday March 11 05:46:23 UTC until March 31 midnight there were approximately 2,806 earthquakes ranging in magnitude 3.9 through 7.9.

As of August 10 there were 4,308 earthquakes in or near Japan for year 2011 according to the USGS earthquake data (not including small quakes under M 3.0) with March the most active month of the year.

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Q: Why earthquake occurred twice in Japan in 2011?
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Related questions

What year was Japan's earthquake?

It depends on the earthquake you are talking about. Many have occurred in Japan. The most recent is the 2011 earthquake.


When did Japan have the big earthquake in 2011?

It occurred on Friday 11th March 2011


When did the Japan earthquake start?

The earthquake that occurred in Japan started at 2:47 pm (PST) on March 11, 2011.


When and where was the largest earthquake that occurred this week in the world?

Japan, March 11, 2011.


Was the earthquake was am or pm in Japan?

The magnitude 9.0 earthquake off the shore of Japan occurred at 2:46 p.m. (Japan local time) on March 11, 2011.


What is the Magnitude of an earthquake and how big was the earthquake in Japan?

The magnitude of an earthquake is a number used to quantify how much energy was released during the earthquake. The earthquake in Japan that occurred on Friday, March 10, 2011, had a moment magnitude of 8.9.


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April 21, 2011, Japan was hit with an earthquate with a magnitude of 6.3


When did the 2011 Japan earthquake happen?

The magnitude 9.0 earthquake that hit Japan in 2011 occurred at 14:46 JST (05:46 UTC) on Friday 11 March 2011. You can see what time that was in your area in the related links below.


What year did Japan have an earthquake followed by a tsunami?

On March 11, 2011, a magnitude 9.0 earthquake occurred near the east coast of Japan, which triggered a massive tsunami. UPDATE: Official magnitude was updated to 9.1 on Nov 7, 2016.


Was the 2011 japan tsunami expected?

Once the earthquake that triggered the tsunami occurred, authorities knew that a tsunamis was likely. Prior to the earthquake there was no way of predicting it.


What was the magnitude of the earthquake that hit Japan Fri Mar 11th 2011?

The biggest earthquake to hit Japan to date occurred Friday afternoon March 11, 2011. It is estimated at a magnitude of 8.8 with a tsunami of over 30 feet.


When was the biggest earthquake in japan?

The biggest recorded earthquake occurred on March 11, 2011, just East of Sendai, registering at 8.9 on the Richter scale.The earthquake of March 11, 2011, was recorded on Friday, March 11, 2011 at 02:46:23 PM (Japan Standard Time) at the epicenter.