  The method of waveforms cross correlation (WCC) is used to detect signals
from aftershocks of the August 14, 2016 earthquake within Sakhalin Island,
which had local magnitude ML = 6.1. Arrivals of regular P- and S-waves detected
by the WCC method with various master events at 6 regional stations are
associated into a set of seismic events called the cross correlation standard
event list (XSEL). We compare the XSEL with the bulletin for the same
aftershock sequence compiled in routine seismological processing. The principal
advantage of the XSEL is expressed in the increasing number of found seismic
events with three or more associated stations, a slight decrease in the
magnitude threshold of catalogue completeness, and more accurate location of
the epicentres for even the smallest aftershocks. The improved aftershock
locations tend to cluster in a narrow zone corresponding to the western board
of the Central Sakhalin fault, which defines the boundary between the Okhotsk
and the Eurasian (Amur) slabs.
