Greg Cocks Preliminary Observations of the 5 April 2024 Mw 4.8 New Jersey Earthquake
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https://doi.org/10.1785/0320240024 <-- shared paper
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https://doi.org/10.1785/0320240020 <-- shared paper
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https://doi.org/10.1177/87552930231215428 <-- shared paper
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[This is ‘unusual’ seismic activity and shaking patterns for this part of the USA, on an ‘unmapped’ fault, and seemingly challenging existing models of earthquake risk in the region; while a 4.8 is not big, it must have been quite a surprise for the people in this heavily populated U.S. Northeast not used to such things (per the paper, the USGS estimated it was felt by some 42 million people.]
#GIS #spatial #mapping #earthquake #risk #hazard #spatialanalysis #model #modeling #NewJersey #USA #geology #engineeringgeology #seismic #USGS #seismology #fault #faulting #Tewksbury #DidYouFeelIt #geotechnical #NIST #remotesensing #InSAR #strikeslip #mechanism #thrust
![Geologic map of the epicentral area simplified from Owens et al. (1998) and Drake et al. (1996) draped over topography showing mapped faults (black lines), initial aftershock locations from U.S. Geological Survey (USGS) Comprehensive Earthquake Catalog (ComCat; U.S. Geological Survey [USGS], 2017; downloaded 7 April 2024, at 13:59 UTC; purple circles), and mainshock focal mechanism (see Data and Resources). The location of seismic station BRNJ, which was not recording during the mainshock, is shown by the red square. The New Jersey Highlands, composed of Mesoproterozoic to Ordovician igneous and metamorphic rocks, are shown to the northwest of the white line, and the Newark basin, composed of Mesozoic sedimentary and volcanic rocks, lies to the southeast. Background image is a shaded relief derived from the 10 m National Elevation Dataset (see Data and Resources). Seismicity in inset (gray dots and yellow stars) is from the USGS ComCat (USGS, 2017). The blue rectangle in the inset map indicates the region depicted in the larger figure.](https://files.techhub.social/media_attachments/files/113/476/824/894/887/447/original/96b91ddc620afe7a.png "Geologic map of the epicentral area simplified from Owens et al. (1998) and Drake et al. (1996) draped over topography showing mapped faults (black lines), initial aftershock locations from U.S. Geological Survey (USGS) Comprehensive Earthquake Catalog (ComCat; U.S. Geological Survey [USGS], 2017; downloaded 7 April 2024, at 13:59 UTC; purple circles), and mainshock focal mechanism (see Data and Resources). The location of seismic station BRNJ, which was not recording during the mainshock, is shown by the red square. The New Jersey Highlands, composed of Mesoproterozoic to Ordovician igneous and metamorphic rocks, are shown to the northwest of the white line, and the Newark basin, composed of Mesozoic sedimentary and volcanic rocks, lies to the southeast. Background image is a shaded relief derived from the 10 m National Elevation Dataset (see Data and Resources). Seismicity in inset (gray dots and yellow stars) is from the USGS ComCat (USGS, 2017). The blue rectangle in the inset map indicates the region depicted in the larger figure.")
