The first type of triggering may be due to static changes in the critical state . For example , after the magnitude 7.3 Landers earthquake struck California in 1992 , it is said that " the earthquake map of California lit up like a Christmas tree " . This event reinforced the idea of remotely triggered earthquakes , and pushed the hypothesis into the scientific mainstream . Following the very large 2004 Indian Ocean earthquake , it was established that remote earthquakes had been triggered as far away as Alaska
2004 Indian Ocean earthquake
2004 Indian Ocean earthquake and tsunami
Remotely triggered earthquakes