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A collapsed stone wall at Fukui Castle
|UTC time||1948-06-28 07:13:31|
|Local date||June 28, 1948|
|Local time||16:13:31 JST|
|Depth||10 km (6.2 mi)|
|Total damage||US$ 1 billion|
|Max. intensity|| MM IX |
|Casualties|| 3,769 dead |
The 1948 Fukui earthquake(福井地震Fukui jishin) occurred in Fukui Prefecture, Japan. The magnitude 6.8 quake struck at 5:13:31 p.m.(JDT) on June 28. The strongest shaking occurred in the city of Fukui, where it was recorded as 6 (equivalent to the current 7) on the Japan Meteorological Agency seismic intensity scale. The shock occurred near the town of Maruoka.
Fukui Prefecture is a prefecture of Japan located in the Chūbu region on Honshū island. The capital is the city of Fukui.
Japan is an island country in East Asia. Located in the Pacific Ocean, it lies off the eastern coast of the Asian continent and stretches from the Sea of Okhotsk in the north to the East China Sea and the Philippine Sea in the south.
The Japan Meteorological Agency (JMA) Seismic Intensity Scale is a seismic intensity scale used in Japan to categorize the intensity of local ground shaking caused by earthquakes.
This earthquake was caused by a strike-slip fault that was unknown until this earthquake. The fault stretches from Kanazu to Fukui, 25 km (16 mi) long, and was later named the "Fukui Earthquake Fault". Shaking was felt as far as Mito in the east, and Saga in the west.
Mito is the capital city of Ibaraki Prefecture, in the northern Kantō region of Japan. As of September 2015, the city has an estimated population of 270,953, and a population density of 1,250 persons per km2. Its total area is 217.32 km2.
Damage was most reported in the Fukui plain, where the building collapse rate was more than 60%, since shaking became larger due to it being an alluvial plain, and many of the buildings were just built after the war and a little unstable.
An alluvial plain is a largely flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland regions, from which alluvial soil forms. A floodplain is part of the process, being the smaller area over which the rivers flood at a particular period of time, whereas the alluvial plain is the larger area representing the region over which the floodplains have shifted over geological time.
At the time many people were cooking so after the earthquake many fires spread. Since the roads and the waterworks were damaged it took 5 days to put out the fires and so the fires caused devastating damage.
Even though the Daiwa Department Store collapsed, the Fukui Bank building right next to it had no significant damage. It is thought to have been because the Fukui Bank building had about 500 deep foundation pipes 10 meters deep in the ground.
A deep foundation is a type of foundation that transfers building loads to the earth farther down from the surface than a shallow foundation does to a subsurface layer or a range of depths.
Almost all of the farmers' houses in the epicenter area collapsed, but most of the farmers were outside so there were not many casualties.
|Half collapsed buildings||3,158|
|Building collapse rate||79.0%|
|Burnt area||2,120,600 m²|
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