The occurred in
Fukui Prefecture
is a Prefectures of Japan, prefecture of Japan located in the Chūbu region of Honshū. Fukui Prefecture has a population of 737,229 (1 January 2025) and has a geographic area of 4,190 Square kilometre, km2 (1,617 sq mi). Fukui Prefecture border ...
,
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
. The magnitude 6.8 quake struck at 4:13:31 p.m.(
JDT) on June 28, 1948. The quake's
hypocenter
A hypocenter or hypocentre (), also called ground zero or surface zero, is the point on the Earth's surface directly below a nuclear explosion, meteor air burst, or other mid-air explosion. In seismology, the hypocenter of an earthquake is its ...
was approximately 10 km north-northeast of Fukui, in the present-day neighborhood of
Maruoka,
Sakai City. 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 Japan Meteorological Agency (JMA) Seismic Intensity Scale (known in Japan as the Shindo seismic scale) is a seismic intensity scale used in Japan to categorize the intensity of local ground shaking caused by earthquakes.
The JMA intensit ...
.
Overview
The earthquake devastated Fukui, which was still recovering from damage sustained during
WWII air raids in July 1945. Damage across the entire Fukuiheiya flood plain into neighboring Ishikawa prefecture. Official casualty estimates totaled 3,769 dead and 22,000 wounded, with more than 36,000 buildings completely destroyed. In the Kanazugocho district (modern-day eastern
Awara);
Maruoka and
Harue; and
Yoshida District, nearly every building was leveled. In central Fukui city, which was adjacent to the epicenter, approximately 79% of structures were completely destroyed, while the overall destruction rate across the Fukuiheiya floodplain surpassed 60%. Fires caused by the earthquake compounded the destruction.
The quake also seriously damaged the embankments of the
Kuzuryū River
The is a river flowing through Fukui Prefecture, Japan. It has its source at the Aburasaka Pass (油坂峠 ''Aburasaka-tōge'') in the city of Ōno and empties into the Sea of Japan near the city of Sakai.
River system
Some of the main rivers ...
. Record-setting rain in the weeks following the quake subsequently caused the levees to burst, leading to massive flooding.
Although three years of war damage, earthquake damage, fire damage, and flood damage reduced the city to ashes, it continued to rebuild. In honor of the citizens' resilience, the Fukui citizen's charter proclaims Fukui "City of the
Phoenix."
Geology

This earthquake was caused by a previously unknown
strike-slip fault
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...
. The fault stretches from
Kanazu to
Fukui,
with a length of , and was later named the "Fukui Earthquake Fault". Shaking was felt as far as
Mito in the east, and
Saga
Sagas are prose stories and histories, composed in Iceland and to a lesser extent elsewhere in Scandinavia.
The most famous saga-genre is the (sagas concerning Icelanders), which feature Viking voyages, migration to Iceland, and feuds between ...
in the west.
Damage

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
An alluvial plain is a plain (an essentially flat landform) created by the deposition of sediment over a long period by one or more rivers coming from highland regions, from which alluvial soil forms. A ''floodplain'' is part of the process, bei ...
, and many of the buildings were just built after the war and a little unstable.
As many people were cooking when the earthquake struck, many fires spread after the quake. Since the roads and the waterworks were damaged it took five 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
A pile or piling is a vertical structural element of a deep foundation, driven or drilled deep into the ground at the building site. A deep foundation is a type of foundation (architecture), foundation that transfers building loads to the e ...
pipes 10 meters deep in the ground.
Almost all of the farmers' houses in the epicenter area collapsed, but most of the farmers were outside so there were not many casualties.
Damage in Fukui City
Casualties
At the time, it was the deadliest
earthquake
An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they ...
after the
Pacific War
The Pacific War, sometimes called the Asia–Pacific War or the Pacific Theatre, was the Theater (warfare), theatre of World War II fought between the Empire of Japan and the Allies of World War II, Allies in East Asia, East and Southeast As ...
(now superseded by the
Great Hanshin earthquake
The Great Hanshin Earthquake (, ) occurred on January 17, 1995, at 05:46:53 JST in the southern part of Hyōgo Prefecture, Japan, including the region of Hanshin. It measured 6.9 on the moment magnitude scale and had a maximum intensity of 7 o ...
and the
Tōhoku earthquake and tsunami). This earthquake killed 3769 people, mainly in
Sakai City (then part of Fukui City), where the death rate was more than 1%.
Property damage
*
Maruoka Castle collapsed.
*
Hosorogi Station and Kanazu Station (now
Awaraonsen Station) collapsed.
* The Daiwa Department Store collapsed.
* A theater in Fukui collapsed and caught fire, killing a few hundred people.
Other
*
Levee
A levee ( or ), dike (American English), dyke (British English; see American and British English spelling differences#Miscellaneous spelling differences, spelling differences), embankment, floodbank, or stop bank is an elevated ridge, natural ...
s damaged by the earthquake and torrential rains caused
Kuzuryū River
The is a river flowing through Fukui Prefecture, Japan. It has its source at the Aburasaka Pass (油坂峠 ''Aburasaka-tōge'') in the city of Ōno and empties into the Sea of Japan near the city of Sakai.
River system
Some of the main rivers ...
to overflow.
Influence
* The
Japan Meteorological Agency
The Japan Meteorological Agency (JMA; ''気象庁, Kishō-chō'') is a division of the Ministry of Land, Infrastructure, Transport and Tourism dedicated to the Scientific, scientific observation and research of natural phenomena. Headquartered ...
added ''
Shindo'' 7 to the Japan Meteorological Agency seismic intensity scale.
See also
*
List of earthquakes in 1948
*
List of earthquakes in Japan
This is a list of earthquakes in Japan with either a magnitude greater than or equal to 7.0 or which caused significant damage or casualties. As indicated below, magnitude is measured on the Richter scale (''ML'') or the moment magnitude scale ('' ...
References
External links
Earthquake in Japan: June 1948– slideshow by ''
Life magazine
''Life'' (stylized as ''LIFE'') is an American magazine launched in 1883 as a weekly publication. In 1972, it transitioned to publishing "special" issues before running as a monthly from 1978 to 2000. Since then, ''Life'' has irregularly publi ...
''
*
{{DEFAULTSORT:1948 Fukui Earthquake
Fukui earthquake
Fukui earthquake
June 1948 in Asia
Fukui
Earthquakes of the Showa era
History of Fukui Prefecture
1948 disasters in Japan