At UTC 2017-11-12 18:18:17,an Mw7.3 earthquake occurred at the border between Iran and Iraq(location 34.886°N,45.941°E,depth 23 km according to USGS).We carried out focal mechanism and rupture process studie...At UTC 2017-11-12 18:18:17,an Mw7.3 earthquake occurred at the border between Iran and Iraq(location 34.886°N,45.941°E,depth 23 km according to USGS).We carried out focal mechanism and rupture process studies with the data from IRIS data center,using 26 far-field P-waveforms and 25 SH-waveforms with high S/N ratio and relatively even azimuth coverage(epicentral distance)in a point source model to invert for the focal mechanism solution;the result(Figure1)was used to construct a finite fault model for rupture process inversion(Yao and Ji,1997;Wang et al.,2008),resulting in a preliminary slip distribution of this earthquake(Figures 2-4).The calculated seismic moment is 1.1×1020 N·m,Mw=7.3.The maximum slip is about 700 cm.展开更多
As the Iraq War gets stalemated,the Shiite force’s rising in Iraq has transformed Iran-Iraq relations.In this new situation,Iran has shifted its Iraq policy in order to eliminate the traditional hostilities between t...As the Iraq War gets stalemated,the Shiite force’s rising in Iraq has transformed Iran-Iraq relations.In this new situation,Iran has shifted its Iraq policy in order to eliminate the traditional hostilities between the two nations and to develop its connections with Iraqi Shiite groups.Relying on its close ties with the Iraqi Shiites,Iran is trying to exert its influence on the Iraqi internal affairs so as to prevent the U.S.from changing Iran’s political system and threatening Iran’s national security.展开更多
基金supported by the National Natural Science Foundation of China (grants 41630210 and 41474036)
文摘At UTC 2017-11-12 18:18:17,an Mw7.3 earthquake occurred at the border between Iran and Iraq(location 34.886°N,45.941°E,depth 23 km according to USGS).We carried out focal mechanism and rupture process studies with the data from IRIS data center,using 26 far-field P-waveforms and 25 SH-waveforms with high S/N ratio and relatively even azimuth coverage(epicentral distance)in a point source model to invert for the focal mechanism solution;the result(Figure1)was used to construct a finite fault model for rupture process inversion(Yao and Ji,1997;Wang et al.,2008),resulting in a preliminary slip distribution of this earthquake(Figures 2-4).The calculated seismic moment is 1.1×1020 N·m,Mw=7.3.The maximum slip is about 700 cm.
文摘As the Iraq War gets stalemated,the Shiite force’s rising in Iraq has transformed Iran-Iraq relations.In this new situation,Iran has shifted its Iraq policy in order to eliminate the traditional hostilities between the two nations and to develop its connections with Iraqi Shiite groups.Relying on its close ties with the Iraqi Shiites,Iran is trying to exert its influence on the Iraqi internal affairs so as to prevent the U.S.from changing Iran’s political system and threatening Iran’s national security.
