A CHARACTERISTIC FEATURE OF THE DISLOCATION MODEL OF FORESHOCKS OF THE HAICHENG EARTHQUAKE, LIAONING PROVINCE
JIN YANInstitute of Geophysics, Academia SinicaZHAO YIThe Seismological Brigade of Guangzhou, National Seismological BureauCHEN YONG;YAN JIA-QUAN;ZHOU YU-RUInstitute of Geophysics, Academia Sinica
A characteristic feature of the dislocation model of the foreshocks of the Hai-cheng Earthquake is their uniformity. It is indicated that the ratio of the maximumvertical amplitudes of the P and S waves recorded at each station appears quitestable. By comparing with five swarms of earthquakes occurred elsewhere in China,this may be helpful in distinguishing foreshocks of an earthquake sequence from anearthquake swarm.