A great landslide caused by an earthquake killed hundreds of people in January 2001 near

The catastrophic landslide occurred after the 13 January 2001 El Salvador earthquake, which triggered widespread slope failures across southern El Salvador. USGS and field reports state that the earthquake induced thousands of landslides concentrated east of Lake Ilopango and elsewhere; the single most deadly slide occurred in the Las Colinas neighborhood of Santa Tecla (adjacent to and part of the San Salvador metropolitan area), where approximately 585 people were killed when a large, rapidly moving landslide devastated the community [2]. Because Santa Tecla is immediately west of San Salvador and part of its metro area, the correct answer is San Salvador [2].

Sources

1. [1] https://pubs.usgs.gov/of/2001/0141/report.pdf
2. [2] https://www.usgs.gov/publications/landslides-triggered-13-january-and-13-february-2001-earthquakes-el-salvador