gPhone重力仪和VP宽频带倾斜仪同震响应对比

Coseismic Response Comparision of gPhone Gravimeter and VP Broadband Tiltmeter

利用莆田台gPhone重力仪和VP宽频带倾斜仪记录到的地震进行同震响应特征对比分析,结果表明:①同震响应延迟时间同震级呈负相关、同震中距呈正相关,同震响应持续时间、波幅的变化主要取决于震级,同震中距没有必然联系;②重力仪记录到同震响应地震事件个数多于宽频带倾斜仪,从同震响应持续时间、波幅变化等同震响应特征看,重力仪的记震能力优于宽频带倾斜仪,但二者同震响应延迟时间没有差异。

The coseismic response characteristics recorded by Putian gPhone gravimeter and VP wide-band tiltmeter were compared and analyzed.The results show that:(1)The delay time of coseismic response was negatively correlated with magnitude and positively correlated with epicentral distance.The variation of coseismic response duration and amplitude mainly depends on magnitude,but not necessarily related to epicentral distance;(2)The number of coseismic events recorded by gravimeter was more than that recorded by broadband tiltmeter.From the characteristics of coseismic response,such as duration of coseismic response,amplitude change and so on,the recording ability of gravimeter was better than that of broadband tiltmeter,but there was no difference in the delay time of coseismic response between gravimeter and broadband tiltmeter.