Fig. 2: Improvement of correlogram quality based on the selections of earthquake mechanisms and receiver pair geometries.
From: An estimate of absolute shear-wave speed in the Earth’s inner core
a Correlogram calculated from records of events of Mw ≥ 6.8 listed from 2010 to 2019 in the GCMT catalog, using all station pairs available in IRIS DMC (see Data Availability). b Correlogram after selecting normal and reverse events and station pairs that satisfy the back-azimuth condition (see Methods for details). c Map of 139 normal and reverse faulting earthquakes (beachballs in red and blue, respectively) and seismometer locations (triangles) used in this study. d Example of source-receiver pairs geometry analyzed in this study (see Methods for more details). Thin black lines represent the projection of the great circle plane between an earthquake in the Banda Sea region (blue beach ball) and stations (triangles) at azimuths 145 ± 10° and −123 ± 10°.
