2025年3月28日缅甸7.9级地震的快速产出参数

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AbstractAt 14：20 （Beijing time） on March 28，2025，a magnitude 7.9 earthquake struck the Mandalay region in centralMyanmar.Inresponse，the Instituteof Geophysics，China EarthquakeAdministration，initiatedarapidscientific assessment involving multidisciplinaryteams.Source parameters，focal mechanism，rupture process，and seismic radiated energy were estimated.According to the inferrd source model， ground shaking intensitymap and coseismic deformation field were simulated.The results indicate thattheearthquake occured along the Sagaing fault and wascharacterized by predominant right-lateral strike-slip motion.Both the moment energyratio and the slownessparameter exceed global averages，suggestinga relatively high level of energy dissipation. The estimated intensity in the epicentral region may have reached or exceeded level ΔX （on the Modified Mercalli Intensity scale）， potentially affecting an area of approximately three hundred thousand km2 .Significant coseismic displacement was shown with the maximum horizontal offset

reaching 1.09m

KeywordsMandalay Myanmar earthquake; source parameters; rupture process; Shakemap prediction; coseismic deformation simulation; earthquake radiation energy

0 引言

根据中国地震台网正式测定，北京时间2025年3月28日14时20分（当地时间12时50分）在缅甸曼德勒市附近地区发生7.9级地震，震中位于（ 21.85∘N ， 95.95∘E （图1。（剩余6794字）