UTC time | 1992-09-02 10:26 |
---|---|
ISC event | 271074 |
USGS- ANSS | ComCat |
Local date | September 2, 1992 |
Local time | 04:26 a.m. MDT |
Magnitude | 5.8 Mw |
Depth | 13.9 km (8.6 mi) |
Epicenter | 37°06′00″N 113°29′49″W / 37.1°N 113.497°W |
Fault | Hurricane Fault |
Areas affected | Utah, southern Nevada, northwest Arizona |
Total damage | US$1 million |
Max. intensity | MMI VII (Very strong) |
Peak acceleration | 0.233 g |
Peak velocity | 2.998 cm/s |
Casualties | None |
The 1992 St. George earthquake was a Mw5.8 earthquake that occurred on September 2, 1992 at approximately 4:26 AM MDT along the Washington Fault zone near the larger Hurricane Fault about 5 miles (8.0 km) southeast of St. George in Utah, United States. The quake triggered a landslide that destroyed three houses and caused approximately US$1 million in structural and cosmetic damage to houses, roads, natural formations, and utilities. No people were killed by the quake.
At 4:26 AM MDT on September 2, 1992, a magnitude 5.8 earthquake occurred along the Washington Fault zone near the larger Hurricane Fault about 5 miles (8.0 km) southeast of St. George in Utah, United States. [1]
Reports on the magnitude of the earthquake vary. [1] [2] [3] The University of Utah reported the quake as a Mw5.8 in their official report via the Intermountain Seismic Belt Historical Earthquake Project, [4] which is supported by a 1994 news article from the Deseret News [5] and an official report from the Utah Geological Survey. [6] A contemporaneous report from the journal Arizona Geology reported Mw5.5 from the University of Arizona and Mw5.9 from the USGS. [1]
Most of the force of the earthquake was directed away from the city of St. George toward Hurricane and Springdale. [5] In the Balanced Rock Hills area of Springdale, a landslide covered part of Utah State Route 9, taking several hours to complete movement. [6] The slide was about 1,600 feet (490 m) long and 3,600 feet (1,100 m) wide, contained boulders up to 20 feet (6.1 m) in diameter, with a total volume of 18,000,000 cubic yards (14,000,000 m3) and total area of 4,400,400 square feet (408,810 m2). [2] [6] It destroyed three houses as well as above- and below-ground utilities, causing about US$1 million in damage. [5] [6]