Fig. 2
From: Sensor orientation of the TMD seismic network (Thailand) from P-wave particle motions
Orientation results and quality control for a LAMP (2018–2022) and b PHRA (2009–2014) surface seismic stations. Results at LAMP, which include 562 events analyzed (+ blue) and the 423 events (+ orange) that passed quality control, shows that for high-quality events the sensor appears to be aligned with north (359.9° ± 1.4°). Results at PHRA which include 213 analyzed teleseismic events (+ blue) and the 84 events (+ orange) that passed quality control, show that for high-quality events the orientation of seismometer component (BHN) is rotated 207.4º ± 3.1° clockwise from true north