Late on the night of the 7th, there was an earthquake with an epicenter in the northwestern part of Chiba prefecture, and strong shaking with a seismic intensity of over 5 was observed in Adachi-ku, Tokyo and Kawaguchi-shi, Saitama.
It is the first time that a tremor with a seismic intensity of 5 or higher has been observed in the 23 wards of Tokyo since the Great East Japan Earthquake that occurred 10 years ago, and the Japan Meteorological Agency is calling for attention to earthquakes with similar tremors for the next week or so.
According to the Japan Meteorological Agency, there was a magnitude 5.9 earthquake with an epicenter in northwestern Chiba Prefecture at around 10:41 pm on the 7th.
Due to this earthquake,
strong shaking with a seismic intensity of 5 or higher was observed in Adachi Ward, Tokyo, Kawaguchi City, Saitama Prefecture, and Miyashiro Town.
In addition,
▽ seismic intensity 5 lower was observed in Tokyo, Saitama prefecture, Chiba prefecture, and Kanagawa prefecture.
In addition,
we observed shaking with seismic intensity 4 to 1 in Kanto Koshinetsu, Kinki, Tokai, Hokuriku, and various parts of Tohoku.
According to the Japan Meteorological Agency, tremors with a seismic intensity of 5 or higher have been observed in Saitama Prefecture and the 23 wards of Tokyo since the magnitude 9.0 earthquake that caused the Great East Japan Earthquake on March 11, 2011.
According to the observations of the Japan Meteorological Agency, the epicenter is in the northwestern part of Chiba prefecture, the depth of the epicenter is 75 km, and the magnitude indicating the magnitude of the earthquake is estimated to be 5.9.
There was no tsunami caused by this earthquake.
"Long-period ground motion" occurs
In this earthquake, "long-period ground motion" that caused high-rise buildings to shake slowly and greatly occurred, and the second class "2" from the bottom was observed in the 23 wards of Tokyo and the northwestern part of Chiba prefecture.
On the upper floors of skyscrapers in these areas, it is difficult to walk without catching something, and tableware on the shelves and books on the bookshelf may fall off, which may have caused a big shake.
Two earthquakes with a seismic intensity of 1 or higher have occurred near the epicenter this time, and of these, shaking with a seismic intensity of 2 was observed in Nerima Ward, Tokyo after 5 am on the 8th.
The Japan Meteorological Agency is calling for measures such as fixing furniture that is prone to fall, paying attention to earthquakes with the same strong shaking as this time, especially for the next week or so, especially on the 2nd and 3rd.
Also, be aware that there may be an increased risk of rockfalls and landslides in areas with strong shaking.