A number of light aftershocks succeeded the main event , of which the strongest measured a magnitude of 4.1 ( M ) .

Some 155 aftershocks Catastrophe caused Causation further destruction Destroying and drove Influence away survivors .

As of February 2 , 2001 , more than 2,500 aftershocks had hit Attack El Salvador , leading to Causation additional damage Damaging and terrorizing Bodily_harm the inhabitants .

at least eleven aftershocks Catastrophe immediately followed Motion , causing Causation panic throughout coastal towns Placing between the coquimbo and los lagos regions .

Tremors Catastrophe continued almost continuously until midnight and sporadic strong aftershocks were felt Know for several days .

Approximately 60 aftershocks Catastrophe were recorded Recording the following day , but most of these were not felt Change_sentiment .

Numerous aftershocks Catastrophe were detected Know after the main quake Catastrophe , with a few registering at 4.0 magnitude .

The three largest events were the M7.2 thrust mainshock Catastrophe that struck Attack near the unincorporated community of Petrolia midday on April 25 and two primary strike-slip aftershocks Catastrophe measuring 6.5 and 6.6 that followed early the next morning .

The total number of aftershocks that followed the events exceeded 2,000 .

The sequence of events included a foreshock of magnitude 5.2 that occurred Presence the prior May , the main shock on 19 September , and two large aftershocks Catastrophe .

As of 18:00 CST ( 10:00 UTC ) , 22 July 2013 , 422 aftershocks Catastrophe had been recorded Recording .

By 24 January , at least 52 aftershocks Catastrophe measuring 4.5 or greater had been recorded Control .

Due to the remote location of the mainshock Catastrophe and a series of strong aftershocks Catastrophe , damage Damaging to man made Action structures was limited Limiting to a few cabins close to the areas of the highest intensity .

Two aftershocks Catastrophe of magnitude 5.2 occurred Coming_to_be , one approximately an hour after the main event Process_end and another approximately eleven hours after the main event Process_end .