";s:4:"text";s:5069:" This earthquake is similar to the Mw5.9 October 1, 1987 Whittier Narrows earthquake, located approximately 18 miles to the northwest. The 1990 Upland earthquake occurred at 15:43:37 local time on February 28 with a moment magnitude of 5.7 and a maximum Mercalli Intensity of VII (Very strong).This left-lateral strike-slip earthquake occurred west of the San Andreas Fault System and injured thirty people, with total losses of $12.7 million. Source inversion of the 1988 Upland, California, earthquake: Determination of a fault plane for a small event. Two earthquakes hit Armenia on December 7, 1988, killing 60,000 people and destroying nearly half a million buildings. Ten miles to the north, the Upland earthquakes that occurred in 1988 & 1990, had left-lateral strike-slip motion. The edges of the overlapping aftershock zones, which are sharply defined, together with background seismicity, outline a 14-km-long aseismic segment of the San Jose fault. The USGS database shows that there is a 99.12% chance of a major earthquake within 50km of Upland, CA within the next 50 years. How-ever, the Whittier Narrows main shock was a pure east-west thrust faulting earthquake. The 1989 Loma Prieta earthquake occurred on California’s Central Coast on October 17 at 5:04 p.m. local time (1989-10-18 00:04 UTC). G. Galway Lake Earthquake. Earthquake Information for Upland, California. It was the strongest earthquake to hit the area since the San Francisco earthquake of 1906. The 1988 and 1990 Upland earthquakes ruptured abutting or possibly overlapping segments of the San Jose fault. The first is imaged,by the locations of the initial month of aftershocks of the 1988 Upland earthquake, which delineate a fault with a,dip angle of similar to 45 degrees between 7 and 9 km depth, consistent with the mainshock focal mechanism. The 1988 and 1990 Upland earthquakes ruptured abutting or possibly overlapping segments of the San Jose fault. How-ever, the Whittier Narrows main shock was a pure east-west thrust faulting earthquake. The USGS database shows that there is a 99.12% chance of a major earthquake within 50km of Upland, CA within the next 50 years. And it might have worsened quake strain. 1.7 magnitude earthquake 2020-05-06 22:01:36 UTC at 22:01 May 06, 2020 UTC Location: Epicenter at 33.869, -117.495 2.2 km from Home Gardens (1.2 miles) The first is imaged by the locations of the initial month of aftershocks of the 1988 Upland earthquake, which delineate a fault with a dip angle of ∼45° between 7 and 9 km depth, consistent with the mainshock focal mechanism. This earthquake is similar to the Mw5.9 October 1, 1987 Whittier Narrows earthquake, located approximately 18 miles to the northwest. Type of Faulting: Hart and others (1988) Surface Rupture Age: Jennings (1994) Slip Rate: Extrapolated from Emerson fault slip rate Rupture Interval: Based on freshness of scarps before 1975 quake and on assumed slip rate; Probable Magnitudes: Derived from rough calculation This left-lateral strike-slip earthquake occurred west of the San Andreas Fault System and injured thirty people, with total losses of $12.7 million. The synthe- tics developed in modeling the 1988 Upland sequence were available for 1987 Whittier Narrows Earthquake (SCEDC) 1988 Tejon Ranch Earthquake (SCEDC) 1988 Upland Earthquake (SCEDC) 1988 Pasadena Earthquake (SCEDC) 1989 Malibu Earthquake (SCEDC) 1989 Newport Beach Earthquake (SCEDC) 1989 Montebello Earthquake (SCEDC) 1990 Upland Earthquake (SCEDC) 1991 Sierra Madre Earthquake (SCEDC) 1992 Joshua Tree Earthquake (SCEDC) The largest earthquake within 30 miles of Upland, CA was a 5.7 Magnitude in 1987. A team of earthquake and engineering experts from the United States spent a period of time in Armenia in December 1988 and January 1989. Ten miles to the north, the Upland earthquakes that occurred in 1988 & 1990, had left-lateral strike-slip motion. Bulletin of the Seismological Society of America (1990) 80 (3): 507–518. The 1990 Upland earthquake occurred at 15:43:37 local time on February 28 with a moment magnitude of 5.7 and a maximum Mercalli Intensity of VII. Earthquake Information for Upland, California. The 1988 and 1990 Upland earthquakes ruptured abutting or possibly overlapping segments of the San Jose fault. We relocate earthquakes that occurred near the 1988 (ML = 4.7) and the 1990 (ML = 5.5) Upland, California, earthquakes to map the fault geometry of the poorly defined San Jose fault and to test the static stress triggering hypothesis for this sequence. The epicenter of the 1988 Spitak earthquake is placed in this sutural zone that represents the principal structural division of Transcaucasia into the Lesser Caucasus and the Armenian Upland. The shock was centered in The Forest of Nisene Marks State Park approximately 10 mi (16 km) northeast of Santa Cruz on a section of the San Andreas Fault System and was named for the nearby Loma Prieta Peak in the Santa Cruz Mountains. Jim Mori, Stephen Hartzell; Source inversion of the 1988 Upland, California, earthquake… ";s:7:"keyword";s:22:"upland earthquake 1988";s:5:"links";s:4524:"Nike Sb Dunk Reese,
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