1927 Lompoc earthquake
UTC time | 1927-11-04 13:51:03 |
---|---|
ISC event | 909604 |
USGS-ANSS | ComCat |
Local date | November 4, 1927 |
Local time | 5:49 P.M. PST |
Magnitude | 7.3 Ms |
Depth | 10.0 km |
Epicenter | 34°48′47″N 120°46′26″W / 34.813°N 120.774°W |
Fault | Possibly the Hosgri Fault |
Type | Unknown (possibly thrust or reverse and/or with some strike-slip component) |
Areas affected | California |
Total damage | Limited |
Max. intensity | X (Extreme) |
Tsunami | 2 meters (6.6 feet) |
Landslides | Yes |
Casualties | None |
The Lompoc earthquake of 1927 occurred at 5:49 a.m. Pacific Standard Time (PST), on November 4 with an epicenter off the coast of Lompoc, Santa Barbara County in Southern California.[1] It is one of the largest earthquakes to have occurred off the coast of California, measuring a surface-wave magnitude of 7.3.[2][3][4] The earthquake may have originated along the Hosgri Fault, an entirely offshore structure.[5] Shaking from the earthquake and an unusually large tsunami caused some damage to communities near the earthquake. Due to its location and the area being sparsely populated at the time, there were no human fatalities reported. It is the only California-generated tsunami recorded in Hawaii.[6]
Geology
The San Simeon-
Earthquake
The epicenter was located 80 km west of
Tsunami
The earthquake triggered a tsunami that reached a maximum height of 2 meters was seen at Surf and Pismo beach, and was 1.2 meters at Port San Luis.[6] The tsunami measured 7 cm at La Jolla, San Diego. A positive wave was sent in the direction towards the California coast, as reported by eyewitnesses that there was no receding of the seawater before the waves hit. Tide gauges in Hawaii measured the tsunamis at 2 cm at Honolulu and 10 cm at Hilo.[6]
See also
References
- ^ "M 6.9 - offshore Central California". US Geological Survey. Retrieved 24 November 2020.
- ^ William Gawthrop (1978). "The 1927 Lompoc, California earthquake". Bulletin of the Seismological Society of America. 68 (6): 1705–1716. Retrieved 2 July 2021.
- ^ a b "Significant Earthquake Information". NOAA NCEI. Retrieved 24 November 2020.
- ^ "Preferred Magnitudes of Selected Significant Earthquakes" (PDF). USGS. 24 June 2013. Retrieved 24 November 2020.
- ^ D. V. HELMBERGER, P. G. SOMERVILLE, AND E. GARNERO (August 1992). "THE LOCATION AND SOURCE PARAMETERS OF THE LOMPOC, CALIFORNIA, EARTHQUAKE OF 4 NOVEMBER 1927" (PDF). Bulletin of the Seismological Society of America. 82.
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: CS1 maint: multiple names: authors list (link) - ^ CiteSeerX 10.1.1.988.9910.
- ^ C. Richard Willingham, Jan D. Rietman, Ronald G. Heck, and William R. Lettis. "Characterization of the Hosgri Fault Zone and Adjacent Structures in the Offshore Santa Maria Basin, South Central California". U.S. Geological Survey Bulletin 1995-CC – via United States Geological Survey.
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: CS1 maint: multiple names: authors list (link) - ^ Ronald N. McGinnis, Alan P. Morris, David A. Ferrill, Kevin J. Smart, John A. Stamatakos, Miriam R. Juckett. "INDEPENDENT EVALUATION OF THE HOSGRI FAULT SLIP RATE BASED ON A STRUCTURAL ANALYSIS OF THE PULL-APART BASIN LINKING THE HOSGRI AND SAN SIMEON FAULT SYSTEMS" (PDF). U.S. Nuclear Regulatory Commission Contract No. NRC–HQ–50–14–E–0001 – via Nuclear Regulatory Commission.
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: CS1 maint: multiple names: authors list (link) - ^ a b "Lompoc Earthquake". Southern California Earthquake Data Center. Retrieved 24 November 2020.
- ^ J. F. EVERNDEN, W. M. KOHLER, and G. D. CLOW. "Seismic Intensities of Earthquakes of Conterminous United States Their Prediction and Interpretation" (PDF). Geological Survey Professional Paper (1223): 27–30 – via USGS.
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: CS1 maint: multiple names: authors list (link) - ^ D. S. McCulloch, H. G. Greene, K. S. Heston, and D. M. Rubin. "A Summary of the Geology and Geologic Hazards in Proposed Lease Sale 53, Central California Outer Continental Shelf" (PDF). United States Department of the Interior Geological Survey: 25 – via USGS.
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: CS1 maint: multiple names: authors list (link) - ^ "Significant Earthquakes and Faults Lompoc Earthquake". Southern California Earthquake Data Center. Retrieved 24 November 2020.