Qualla: 1964 Niigata Earthquake

1964 Niigata Earthquake: Introduction

Tue, 17 Feb 2026 00:00:00 GMT

Photo credit 国立防災科学技術センター, CC BY 4.0. One apartment building lies perfectly on its side, windows unbroken, walls uncracked, as if a giant simply tipped it over like a domino. The photograph from June 16, 1964, became one of the most reproduced images in earthquake engineering -- not because of the destruction it shows, but because of what it reveals about the treacherous ground beneath our feet. When a magnitude 7.6 earthquake struck Niigata at 1:01 in the afternoon, the sandy soil beneath the city did something engineers had observed before but never fully understood. It liquefied. Solid ground behaved like a thick soup, and the reinforced concrete apartment buildings of the Kawagishi-cho housing complex, structurally sound and barely damaged by the shaking itself, simply sank and tilted into the earth as their foundations lost all support.

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Image: 国立防災科学技術センター | CC BY 4.0

1964 Niigata Earthquake: When the Ground Turned to Water

Tue, 17 Feb 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The geology beneath Niigata was a time bomb. The city sits on the delta of the Shinano River, Japan's longest, where centuries of sediment had created deep layers of loose, water-saturated sand. Years of pumping groundwater to extract water-soluble natural gas had compounded the ...

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Image: Mikenorton | CC BY-SA 3.0

1964 Niigata Earthquake: Twelve Days of Fire

Tue, 17 Feb 2026 00:00:00 GMT

Photo credit NGDC, Public domain. Five hours after the earthquake, a new disaster began. Damaged pipes at the Showa Shell Sekiyu oil refinery released gasoline that was carried to the surface by the tsunami and by underground water forced up through liquefied soil. The fuel ignited, and the fire leapt from tank t...

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Image: NGDC | Public domain

1964 Niigata Earthquake: The Bridge That Waited Seventy Seconds

Tue, 17 Feb 2026 00:00:00 GMT

Photo credit NGDC, Public domain. The Showa Bridge's collapse offered a puzzle. Eyewitnesses reported that the bridge stood firm through the earthquake's main shaking, only to fail a full seventy seconds after the tremor began. The timing ruled out direct ground motion as the cause. Instead, the liquefied soil be...

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Image: NGDC | Public domain

1964 Niigata Earthquake: Waves from the Sea of Japan

Tue, 17 Feb 2026 00:00:00 GMT

Photo credit NGDC, Public domain. Fifteen minutes after the shaking stopped, the first tsunami wave reached Niigata City. The waves battered Sado Island, Awa Island, and traveled as far as the Oki Islands in Shimane Prefecture. At Ryotsu Harbor, the wave reached 3 meters. Near Iwafune Harbor, it crested at 4 mete...

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Image: NGDC | Public domain

1964 Niigata Earthquake: The Textbook Earthquake

Tue, 17 Feb 2026 00:00:00 GMT

Photo credit 国立防災科学技術センター, CC BY 4.0. The 1964 Niigata earthquake killed relatively few people, but it transformed earthquake science. Along with the Great Alaska earthquake that struck just three months earlier, it forced engineers worldwide to confront soil liquefaction as a primary seismic hazard rather than a cur...

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Image: 国立防災科学技術センター | CC BY 4.0