On October 20, 65 from a 4.1 magnitude earthquake with a depth of 2 kilometers, the epicenter was in Mae Subdistrict, Doi Saket District, Chiang Mai Province. The tremor was felt in 3 provinces at 04:36 last time, Mr. Suwit Kosuwan, an expert. Specialized in mineral resource management consulting The Department of Mineral Resources said that the 4.1 magnitude earthquake was caused by the Mae Tha fault. Interestingly, this event a small earthquake But relatively shallow, depth 2 kilometers, is in the process of analyzing the data. It may be a branch from the Mae Tha fault group. that branched into the Ping River basin area under the sediment of Chiang Mai
But this earthquake It is shallow, causing vibrations to be felt in almost every district of Chiang Mai Province, in the Ping River Basin, Mueang District, Doi Saket District, Mae Rim District, Mae Jo Municipality, San Sai District, especially high-rise buildings and condominiums, including Ban Thi District. Lamphun Province and Dok Khamtai District, Phayao Province
This slide is very interesting. because of the 4.1 earthquake, but it is shallow Can feel the tremors quite a distance. The study data confirms that under Chiang Mai there is a fault hidden beneath the sedimentary layer.
Mr. Suwit said that during 1-2 days there will definitely be aftershocks of 2-3 sizes, but this does not affect the building structure. And tracking that today (Oct. 20) will have a larger earthquake or not. with more than 20 seismic measuring instruments scattered throughout Chiang Mai Province
The Department of Resources, Thani Has sent officials to check whether there is an impact on people’s houses or not. But normally a 4.1 magnitude earthquake may not cause damage. but felt a tremor
Mr. Suwit continued that the relevant agencies and researchers are now in the study for about a year whether there is a fault in Chiang Mai under the city or not. because faults have been found both in the east and west considered new information In addition to the previous information that engineers will design the design of high-rise buildings to be more careful. Including the impact of earthquakes on various structures in Chiang Mai and Chiang Rai provinces, it is expected to be completed in one year.
For minor branch faults from the Mae Tha fault group positioned in the northwest south east There is a lateral overlap movement to the right, where “Mae Tha” is a powerful fault, passing through Mae Tha District, Lamphun Province and Mae On District, Chiang Mai Province in an arc to the east. It is about 61 km long and has frequent earthquakes every year but is small in magnitude 2-4.
From statistics, it was also found that The Mae Tha Fault area in Chiang Mai had a 5.1 earthquake of moderate to strong intensity in 2006. The epicenter was in Mae Rim District with a magnitude of 5.1, which was felt in a wide area. Including studies found that in the past 2,000-3,000 years ago, there had been more than 6.5 earthquakes.