Skip to main content
Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Spatiotemporal crustal strain distribution around the Ishikari-Teichi-Toen fault zone estimated from global navigation satellite system data

Fig. 1

a Regional map of the study area. The black solid line and red triangle indicate active faults (Nakata and Imaizumi 2002) and volcanos, respectively. Focal mechanisms are located at the epicenter of the 2003 Tokachi-oki and 2011 Tohoku earthquakes (F-net solution, NIED 2018). The vectors indicate Pacific plate motion with respect to Okhotsk plate (~ 85 mm/year). b Location of GNSS sites and seismicity associated with the 2018 Iburi earthquake and aftershocks. The mainshock is shown with a red focal mechanism. Background seismicity, denoted by grey circles, are aftershocks over Mj = 3.0 during the ten measured for 10 days following the mainshock. Aberrations of IF and IL are the Ishikari fault zone and Ishikari lowlands, respectively. GNSS site 0128 (Sapporo) is the fixed site used for horizontal velocity estimations. The location and focal mechanism of the 2004 Rumoi earthquake (F-net solution) are also plotted. The red line shows the strain profile used for Fig. 4

Back to article page