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2020/11/15 10:30 Weather news
In the last week, the number of earthquakes observed in Japan has slightly decreased compared to the previous week. There has been no earthquake with a seismic intensity of 3 or more. Earthquakes are sporadic from Amami to the southwestern islands. (Added from November 9 to November 15 at 10:00)
At around 7:57 AM on the 15th (Sunday), an earthquake with a magnitude of 4.5 and an estimated depth of about 100 km occurred off the northwestern coast of the main island of Okinawa. With this earthquake, we have observed a seismic intensity of 2 in Watanagi village and a seismic intensity of 1 from the main island of Okinawa to Kumejima.
In addition, around 9:42 a.m. on Friday the 13th, an earthquake with a magnitude of 4.0 and an estimated depth of about 49 km occurred in the sea near Miyakojima, and a seismic intensity of 2 was observed in Miyakojima. .
Around Okinawa, the Ryukyu Trench is formed by the plate of the Philippine Sea that infiltrates the Eurasian Plate, and plate-boundary-type earthquakes often occur. Earthquakes with deep earthquakes with a depth of about 100-200 km are conspicuous off the northwestern coast of the main island of Okinawa. Did.
The government’s Earthquake Research Promotion Headquarters has not announced the probability of the next earthquake due to insufficient clarification of the characteristics of the earthquake in this area and the fact that the area is so vast that the location of the earthquake cannot be identified. next earthquake. ..
Also, the Meteorological Agency publishes the observed earthquakes on its website even for the earthquakes whose tremor is less than seismic intensity 1, so that you can know the detailed situation of earthquakes occurring in Japan.
In addition, on Saturday the 14th there was an earthquake of magnitude 5.5 in Pakistan. Since the depth was relatively shallow at 12 km, it is estimated that the area around the center of the earthquake was hit by a strong VI vibration in Mercari’s revised seismic intensity class. However, no damage has been confirmed because the area around the center of the earthquake is a mountainous area with an altitude of 3000 m or more and there is no urban area around it.
Pakistan is located on the border between the Indian and Eurasian plates. In particular, the central part of Pakistan, which was the source of this earthquake, has complicated boundaries and is an area where many shallow earthquakes occur with a magnitude of 6 to 7. In addition to the same type of landslide as this time, there are also earthquakes with a reverse failure type mechanism.
Southern Pakistan is also in contact with the Arabian Plate and many earthquakes also occur on this boundary. In 1945, a major earthquake with a magnitude of 8.1 occurred off the coast of Pakistan, and there are records of the tremors, as well as the great damage caused by the tsunami.
* Information on the source and intensity of seismic intensity in Japan comes from the Meteorological Agency, unless otherwise noted. Unless otherwise noted, overseas seismic source information comes from the American Geological Survey (USGS). Source information may differ depending on the issuing organization.
