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The Ramapo Fault zone is a system of faults between the northern Appalachian Mountains and Piedmont areas to the east. [1] Spanning more than 185 miles (298 km) in New York , New Jersey , and Pennsylvania , it is perhaps the best known fault zone in the Mid-Atlantic region, and some small earthquakes have been known to occur in its vicinity.
The Atlantic Seaboard Fall Line, or Fall Zone, is a 900-mile (1,400 km) escarpment where the Piedmont and Atlantic coastal plain meet in the eastern United States. [2] Much of the Atlantic Seaboard fall line passes through areas where no evidence of faulting is present.
Normal fault: Independence Valley fault system: Nevada, United States: Normal fault: Active: 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 ...
Map of the Ramapo Fault System: Earthquake epicenter at Lebanon, NJ. Hopewell Fault (red) and Flemington Fault (light blue) join the Ramapo (yellow) fault near the quake epicenter.
On the east, the Devils Mountain Fault connects with the south striking Darrington Fault (not shown) which runs to the OWL, and the Southern Whidbey Island Fault extends via the Rattlesnake Mountain Fault Zone (dashed line) to the OWL. South of the OWL a definite eastern boundary has not been found, with some indications it is indefinite.
A magnitude 4.8 earthquake shook the East Coast shortly after 10:20 a.m. Friday morning, according to the United States Geological Survey. ... which could help identify the main fault line ...
The Cascadia subduction zone is a 960 km (600 mi) fault at a convergent plate boundary, about 100–200 km (70–100 mi) off the Pacific coast, that stretches from northern Vancouver Island in Canada to Northern California in the United States.
Other major faults and features from west to east: Eastern Border Fault, an inactive Mesozoic rift, formed the Connecticut River Valley and runs along the eastern side of it. The fault can be traced from New Haven, CT to Keene, NH. [20] Sporadic earthquakes along this fault lowered the valley and raised the eastern hills. [21] Merrimack Terrane