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The earthquake ruptured within a fault zone known as the Ramapo system, Simons said. It’s a zone in relatively ancient rock that contains old faults and cracks from ancient tectonic processes.
The New Madrid seismic zone (NMSZ), sometimes called the New Madrid fault line (or fault zone or fault system), is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri.
Given the current geological and seismological data, it is difficult to determine if a known fault is still active today and could produce a modern earthquake. As in most other areas east of the Rocky Mountains, the best guide to earthquake hazard in the northeastern U.S. is probably the locations of past earthquakes themselves.
2008 Wells earthquake (M6.0) Izu–Bonin–Mariana Arc subduction zone >2800: Micronesia: Subduction zone: Active: 1993 Guam (M7.8) Japan Trench: 1400: Off the coast of Honshu: Subduction zone: Active: see Seismicity of the Sanriku coast: Kabaw Fault >300: Myanmar: Oblique-thrust: Active: 1792 Rakhine (M8.8) Kameni-Kolumbo Fault zone >60 ...
The U.S. Geological Survey said it was likely due to a mix-up in time zones set in the test alert system. Residents of earthquake zones 'drop, cover and hold on' during annual ShakeOut quake drill ...
The section of the fault zone directly under "Seattle" corresponds to the red line in the photo at the top. (DGER [9]) One model of the Seattle Uplift: Cross-section (south to north) along the east side of central Puget Sound, looking west. TB = Tacoma Basin EPZ = East Passage Zone (Maury Island), SFZ = Seattle Fault Zone (Alki Point).
The U.S. Geological Survey said that more than 5.3 million people in California were under a tsunami warning, the Associated Press reported, and that more than 1.3 million people lived close ...
The foreground is in the Santa Barbara Channel, the east-trending zone marks the Transverse Range. Faults in the upper left are part of the Eastern California Shear Zone, connecting northward with the Walker Lane region. Faults extend deeper than shown. Cumulative energy released by all earthquakes in Southern California from 1932 through July ...