Fig. 4
From: Remotely triggered seismicity in north China following the 2008 Mw 7.9 Wenchuan earthquake
(a) Seismicity within 30 days and 120 km of station YKO near the aftershock zone of the 1975 Mw 7.0 Haicheng earthquake. (b) The high-pass-filtered envelope functions at station YKO (solid line) and nearby station GAX (gray line; shifted up by 0.5 in log10 amplitude) within 1 hour of the P wave arrival of the Wenchuan earthquake. (c) Raw and high-pass-filtered seismograms showing the teleseismic waves of the Wenchuan earthquake and locally generated seismic events, respectively. Other symbols and notations are the same as in Fig. 2.