Figure 1a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024 in the province of Surigao Del Sur, Mindanao (southern Philippines) in relation to the magnitude 7.4 earthquake of December 3, 2023 in the same province. The result of Coulomb Stress Transfer (CST) modeling is shown. In this model, the fault that generated the magnitude 7.4 earthquake of December 3, 2023 serves as source fault (thrust mechanism) and the fault that generated the August 3, 2024 earthquake serves as receiver fault (thrust fault mechanism). Focal mechanism solutions of the August 2024 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) are shown. Location of cross section in Figure 1b is shown (A-A’). 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

Posted on by

Figure 1a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024 in the province of Surigao Del Sur, Mindanao (southern Philippines) in relation to the magnitude 7.4 earthquake of December 3, 2023 in the same province. The result of Coulomb Stress Transfer (CST) modeling is shown. In this model, the fault that generated the magnitude 7.4 earthquake of December 3, 2023 serves as source fault (thrust mechanism) and the fault that generated the August 3, 2024 earthquake serves as receiver fault (thrust fault mechanism). Focal mechanism solutions of the August 2024 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) are shown. Location of cross section in Figure 1b is shown (A-A’). 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 1a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024 in the province of Surigao Del Sur, Mindanao (southern Philippines) in relation to the magnitude 7.4 earthquake of December 3, 2023 in the same province. The result of Coulomb Stress Transfer (CST) modeling is shown. In this model, the fault that generated the magnitude 7.4 earthquake of December 3, 2023 serves as source fault (thrust mechanism) and the fault that generated the August 3, 2024 earthquake serves as receiver fault (thrust fault mechanism). Focal mechanism solutions of the August 2024 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) are shown. Location of cross section in Figure 1b is shown (A-A’). 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

Latest posts by Rachel Crowell (see all)