Original sentence: Data collected by the PNSN shows a magnitude 1.1 earthquake on that date in the vicinity of the Oso landslide (about 2 ±0.8 km to the northeast), at a depth of 3.9 ±1.9 km.In the days following the slide, Snohomish County Emergency Management Director John Pennington speculated a 1.1 magnitude earthquake on March 10 may have triggered the landslide.Regardless, the United States Geological Survey (USGS) determined the slide was not caused by seismic activity
Edited sentence: Data collected by the PNSN shows a Magnitude 1.1 earthquake in the vicinity of the Oso landslide (about 2 ±0.8 km to the northeast), at a depth of 3.9 ±1.9 km, twelve days earlier on March 10.The United States Geological Survey (USGS) determined the slide was not caused by seismic activity.This is the quake that Snohomish County Emergency Management Director John Pennington speculated might have triggered the landslide