The Mw7.0 Anchorage earthquake is most significant event since 1964 Mw9.2. Far away subduction zone trace, thus the seismogenic structure and failure plane are not clear and keep disputed. Based on published data, including faults, aftershock, focal mechanism solutions and source fault model and so on, we make comprehensive analysis and discussion. We think that this earthquake belongs to plate subduction event, without relationship with Castle Mountain fault and Border Ranges fault for seismogenic structure, only earthquake-controlling structure. Both faults are not responsible for the Anchorage earthquake. The actual seismogenic fault plane has a south-to-north trending and dips to east, which is corresponding to the nodal plane I.
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Detterman RL, Plafker G, Travis H, Tysdal RG, Pavoni N (1974) Surface geology and Holocene breaks along the Susitna segment of the Castle Mountain fault, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF–618, scale 1:24,000
Haeussler PJ (1998) Surficial geologic map along the Castle Mountain fault between Houston and Hatcher Pass Road, Alaska. Center for Integrated Data Analytics Wisconsin Science Center
Hayes GP, Moore GL, Portner DE, Hearne M, Flamme H, Furtney M, Smoczyk GM (2018) Slab2 a comprehensive subduction zone geometry model. Science, eaat4723-
King GCP, Stein RS, Jian L (1994) Static stress changes and the triggering of earthquakes. Bull Seismol Soc Am 78(3):935–953
Mankhemthong N, Doser DI, Baker MR, Kaip GM, Eslick BE, Jones S, Eslick BE (2010) Modeling gravity data from a recent (2009–2010) survey across the border ranges fault system, Alaska. Paper presented at the Agu Fall Meeting
NGL (Nevada Geodetic Laboratory) (2018) Anchorage earthquake coseismic displacement (December 1, 2018). http://geodesy.unr.edu//
Parry WT, Bunds MP, Bruhn RL, Hall CM, Murphy JM (2001) Mineralogy 40Ar/39Ar dating and apa-tite fission track dating of rocks along the Castle Mountain fault. Alaska Tectonophysics 337(3–4):149–172
Stein RS (1999) The role of stress transfer in earthquake occurrence. Nature 402:605. https://doi.org/10.1038/45144
Stein RS (2003) Earthquake conversations. Sci Am 288:72–79
Temblor (2018) Exotic M = 7.0 earthquake strikes beneath Anchorage, Alaska. http://temblor.net/earthquake-insights/exotic-m7-0-earthquake-strikes-beneath-anchorage-alaska-8010/(posted on November 30, 2018 by temblor)
USGS (2018) M 7.0–14 km NNW of Anchorage, Alaska. https://earthquake.usgs.gov/earthquakes/eventpage/ak20419010/executive(last updated 2018-12-08 01:01:06 (UTC))
Wessel P, Smith WHF (1995) New version of the generic mapping Tools released. Eos Tran. AGU 76:329
Willis JB, Haeussler PJ, Bruhn RL, Willis GC (2007) Holocene slip rate for the western segment of the castle mountain fault, Alaska. Bull Seismol Soc Am 97(3):1019–1024
Wilson FH, Hults CP, Mull CG, Karl SM (2015) Geologic map of Alaska: U.S. Geological survey scientific investigations map 3340, pamphlet 197 p., 2 sheets, scale 1:1,584,000. http://dx.doi.org/10.3133/sim3340
We wish to thank Yueqiang Qiao for insightful and helpful reviews. Financial support for this research was provided in part by Scientific Research Fund of Institute of Seismology and Institute of Crustal Dynamics, China Earthquake Administration (Grant No. IS 2018126278). The figures were partially drawn by Generic Mapping Tools (GMT) (Wessel and Smith (1995)).
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Lei, D., Yang, G. The seismogenic tectonic of Anchorage Mw7.0 Earthquake in Alaska, November, 30, 2018. Acta Geophys. 68, 619–626 (2020). https://doi.org/10.1007/s11600-020-00436-x
- Seismogenic structure pattern
- Anchorage Mw7.0 earthquake
- Coulomb stress change
- Active fault systems