Table 2: The results of characteristics analysis.

NoLocationCharacteristic period/dayMaximum abnormal appearance timeDuration/dayMaximum

1Yutian, Ms7.3641 day before earthquake6015
2Wenchuan, Ms8.0134 days before earthquake808
3Yushu, Ms7.11320 days before earthquake6014
4Myanmar, Ms7.213170 days before earthquake9017
5Andaman Islands, Ms7.51630 days before earthquake7017
6Nicobar Islands, Ms7.63240 days after earthquake9011
7Bonin Islands, Ms7.416180 days before earthquake6016
8Northeast Honshu, Ms9.013130 days before earthquake9016