1986 Hualien earthquake
On November 14, 1986, a strong earthquake with a recorded magnitude of 7.4 struck Hualien City in Taiwan. The earthquake killed 15 people and injured 44.[1][2] Landslides occurred along a highway between Su'ao and Hualien. The Taiwan–Guam and Taiwan–Okinawa undersea telecommunication cables were damaged.[3] The earthquake triggered a tsunami with a maximum height of 0.3 m (1 ft 0 in). The tsunami sank 10 fishing boats in Hualien and Yilan and was attributed to six injuries.[4]
Aftershocks
The earthquake was preceded by a ML 6.5 foreshock on 20 May 1986 which struck north of Hualien at 15.8 km (9.8 mi) depth. The foreshock produced aftershocks located on two parallel, steep, east-dipping thrust faults. Aftershocks were distributed northwest of the mainshock and had depths shallower than 16 km (9.9 mi), suggesting the earthquake ruptured unilaterally, northwest, and upward. The 14 November 1986 earthquake produced aftershocks largely concentrated at depths 15 km (9.3 mi) or shallower in the upper crust. Aftershocks extended 37 km (23 mi) deep.[5]
References
- ^ "M 7.4 - 8 km SSW of Hualien City, Taiwan". USGS.
- ^ "NCEI Global Historical Hazard Database". www.ngdc.noaa.gov. Retrieved 2023-04-03.
- ^ National Geophysical Data Center / World Data Service (NGDC/WDS) (1972), Significant Earthquake Database (Data Set), National Geophysical Data Center, NOAA, doi:10.7289/V5TD9V7K
- ^ National Geophysical Data Center / World Data Service (NGDC/WDS) (1972), Global Historical Tsunami Database (Data Set), National Geophysical Data Center, NOAA, doi:10.7289/V5PN93H7
- ^ Hwang, L.J.; Kanamori, H. (1989). "Teleseismic and strong-motion source spectra from two earthquakes in eastern Taiwan" (PDF). Bulletin of the Seismological Society of America. 79 (4): 935–944. Bibcode:1989BuSSA..79..935H. doi:10.1785/BSSA0790040935.
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- Malatya (6.1, May 5)
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- Chalfant Valley (6.2, July 21)
- Vrancea (7.1, August 30) †
- Kalamata (6.0, September 13)
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- Hualien (7.4, November 14)
- João Câmara (5.1, November 30)
† indicates earthquake resulting in at least 30 deaths
‡ indicates the deadliest earthquake of the year
‡ indicates the deadliest earthquake of the year
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