Vivinavi

Nankai Trough Earthquake Related Explanatory Information （ No.2 ）.

JMA
August 10, 15:30 Announced

Nankai Trough Earthquake Related Explanatory Information （ No.2 ）


Magnitude 7 ． 1 （ Moment at 16:43 on August 8, centered in the Hyuga Sea A magnitude 7 ． 0 ） earthquake occurred. Seismic activity has remained active near the epicenter of this earthquake since then.
The number of earthquakes of seismic intensity 1 or higher that occurred in the assumed epicenter area of the Nankai Trough earthquake （ ） including the area around the epicenter of the August 8 earthquake （ ） by 16:00 on August 8 to 14:00 today （ August 10 ） The preliminary report is as follows.
8 times from 16:00 to 24:00 on the 8th （ 1 time, intensity 6 ： 1 time, intensity 2 ： 2 times, intensity 1 ： 5 times ）
8 times from 00:00 to 24:00 on the 9th （ intensity 3 ： 1 time, intensity 2 ： 2 times, intensity 1 ： 5 times ）
1 time from 00:00 to 14:00 on 10th （ Seismic intensity 1 ： 1 time ）
Also, at strain stations, step-like changes associated with the magnitude 7 ． 1 earthquake have been observed, but other than the changes usually seen after earthquakes No changes other than those normally seen after earthquakes have been observed so far.

As a result of studying the relationship between the August 8 earthquake and the Nankai Trough earthquake, the possibility of a large-scale earthquake in the assumed epicenter area of the Nankai Trough earthquake is considered to be relatively higher than under normal conditions, and so at 19:15 on August 8, we issued a Nankai Trough earthquake temporary information （. A huge earthquake warning ） was issued.
The government is calling on the Nankai Trough Earthquake Disaster Prevention Promotion Areas to reconfirm their daily earthquake preparedness and be ready to evacuate immediately if they feel a tremor for one week after the earthquake on August 8. Please continue to take disaster prevention measures in response to calls from the government and local governments.
The JMA will continue to carefully monitor crustal activity along the Nankai Trough.

*Moment magnitude is the magnitude obtained by closely examining the scale of displacement of the epicenter fault. It may be different from the magnitude reported by the Japan Meteorological Agency in earthquake information.


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