Figure 2a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024, in the province of Surigao Del Sur, Mindanao (southern Philippines) and its aftershocks. Here, we show the result of CST modeling in which the fault that generated the mainshock serves as the source fault (thrust mechanism) and the fault that generated the strongest aftershock (magnitude 6.2) serves as the receiver fault (thrust mechanism). We also show the focal mechanism solutions of the mainshock and six succeeding aftershocks with magnitudes ranging from magnitude 4.8 to 6.2, and other post-mainshock events of lower magnitudes (small circles). Location of cross section in Figure 2b is shown (B-B’). Data: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. Credit: Aurelio and Catugas, 2024, CC BY-NC-ND 4.0

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Figure 2a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024, in the province of Surigao Del Sur, Mindanao (southern Philippines) and its aftershocks. Here, we show the result of CST modeling in which the fault that generated the mainshock serves as the source fault (thrust mechanism) and the fault that generated the strongest aftershock (magnitude 6.2) serves as the receiver fault (thrust mechanism). We also show the focal mechanism solutions of the mainshock and six succeeding aftershocks with magnitudes ranging from magnitude 4.8 to 6.2, and other post-mainshock events of lower magnitudes (small circles). Location of cross section in Figure 2b is shown (B-B’). Data: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. Credit: Aurelio and Catugas, 2024, CC BY-NC-ND 4.0

Figure 2a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024, in the province of Surigao Del Sur, Mindanao (southern Philippines) and its aftershocks. Here, we show the result of CST modeling in which the fault that generated the mainshock serves as the source fault (thrust mechanism) and the fault that generated the strongest aftershock (magnitude 6.2) serves as the receiver fault (thrust mechanism). We also show the focal mechanism solutions of the mainshock and six succeeding aftershocks with magnitudes ranging from magnitude 4.8 to 6.2, and other post-mainshock events of lower magnitudes (small circles). Location of cross section in Figure 2b is shown (B-B’). Data: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. Credit: Aurelio and Catugas, 2024, CC BY-NC-ND 4.0

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