Here is the 5M quake sequence, starting about the time of the flux line decline:

04/01/14 11:26:1836.63S53.34E10.05.2SOUTH INDIAN OCEAN
04/01/13 21:54:2322.65S63.41W532.75.1SALTA PROVINCE, ARGENTINA
04/01/13 21:28:5916.20N96.91W33.05.4OAXACA, MEXICO
04/01/13 20:09:5012.30N144.09E33.05.0GUAM REGION
04/01/13 20:04:248.63S105.75E33.05.2SOUTH OF JAVA, INDONESIA
04/01/13 19:50:1916.09N96.92W28.65.0OAXACA, MEXICO

Note that this includes quakes in Argentina and the Indian Ocean.

Donald