Within 6 hours from 19 pm on December 21, 2023 to 1 am on the 22nd, Beijing time, four more obvious ** activities occurred in a row in the waters near the southeast of Tokyo, Japan, and their ** levels reached 5Level 0, 4Level 8, 5Level 3 and 5Level 0, and when this round of ** occurred, the Tokyo metropolitan area and surrounding areas were relatively obvious to feel the earthquake, so does the occurrence of this round of ** mean that the Tokyo area has entered a period of frequent occurrence?
Has the Tokyo area entered a period of frequent occurrence?
There are 4 more obvious ** activities in a row within 6 hours, which is also relatively rare in the vicinity of the Tokyo area, so can we directly determine that it has entered the ** frequent period?The answer is not yet certain. If a region enters the most frequent period, then there must be two criteria, the first is to be active frequently, and the second is to have a long time period, it is obvious that the second standard has not been reached, so it cannot be judged to enter the first frequent period
So is it possible that the Tokyo area will enter the most frequent period?
On this question, it is not yet possible to give a positive answer, but there is such a possibility in the Tokyo area, because the location of this ** is located at the junction of the plates, so it is very likely that there will always be ** activities equivalent to the previous level in the region, as far as the current situation is concerned, Tokyo has a certain probability of entering the ** frequent period.
What is the impact of entering the ** frequent period?
In mid-November this year, there were about 1,400 consecutive events in Iceland in one day, and the highest level of these was only 5Grade 0, which is a typical group earthquake type**. This kind of ** is generally more conducive to prevention, because multiple releases will dilute the ** energy, so the damage intensity will be lower, in early October this year, there was also a group earthquake type in the waters near the Izu Islands in Japan**.
Has there ever been a group earthquake type in my country?
There has also been a group earthquake type in the history of our country, that is, Xingtai in 1966. In the 23-day period from March 6 to March 29, 1966, there were 24 occurrences of a grade of more than 5 in the Xingtai areaLevel 0 activities, where level 6 is overThe number of times of level 0 is 5, and the maximum level is 7Level 2. At that time, both in terms of the seismic level of housing construction and medical conditions were relatively backward, a total of 8,064 deaths, 38,000 injuries, and economic losses were as high as 1 billion yuan. However, if the wheel ** is a mainshock aftershock type, then its mainshock level is likely to be as high as 7Level 5 or higher, it may cause even more damage to the entire Xingtai area.