Qualla: 2000 Izu Islands Earthquakes https://qualla.com/2000-izu-islands-earthquakes en-us © 2026 Bendyline Mon, 20 Jul 2026 10:21:40 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/hero-small.webp Qualla: 2000 Izu Islands Earthquakes https://qualla.com/2000-izu-islands-earthquakes 2000 Izu Islands Earthquakes: Introduction https://qualla.com/2000-izu-islands-earthquakes/ Photo credit Mikenorton, CC BY-SA 3.0. Fourteen thousand two hundred earthquakes in a single summer. That is not a typo. Beginning on the evening of June 26, 2000, the seafloor southwest of Miyake-jima began to shudder, and it did not stop for months. What started as small tremors cascading through the Philippine Sea escalated into one of the most intense earthquake swarms ever recorded in Japan, a seismic barrage that shook houses apart on four separate islands, collapsed mountainsides, and ultimately drove every last resident off Miyake-jima. The swarm was not random chaos -- it was the earth telegraphing a volcanic eruption that would reshape the island's summit into a gaping caldera.

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]]> Mon, 16 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/xn50-2000-izu-islands-earthquakes-intro.mp3 0:06 1 full 2000 Izu Islands Earthquakes: The Evening the Sea Floor Cracked https://qualla.com/2000-izu-islands-earthquakes/ Photo credit Alexrk2, CC BY-SA 3.0. At 18:30 Japan Standard Time on June 26, 2000, seismographs around Miyake-jima began recording a rapid-fire series of small earthquakes centered southwest of the island. Within an hour, the Japan Meteorological Agency issued a volcanic information announcement, warning residents ...

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Image: Alexrk2 | CC BY-SA 3.0

]]> Mon, 16 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/xn50-2000-izu-islands-earthquakes-the-evening-the-sea-floor-cracked.mp3 0:06 2 full 2000 Izu Islands Earthquakes: A Summer of Shaking https://qualla.com/2000-izu-islands-earthquakes/ Photo credit Alexrk2, CC BY-SA 3.0. Through late June, July, and into August, the swarm intensified with astonishing ferocity. The earthquakes spread across the waters west of Miyake-jima and hammered the neighboring islands of Nii-jima and Kozu-shima. Thirty earthquakes reached a maximum seismic intensity of Shind...

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Image: Alexrk2 | CC BY-SA 3.0

]]> Mon, 16 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/xn50-2000-izu-islands-earthquakes-a-summer-of-shaking.mp3 0:06 3 full 2000 Izu Islands Earthquakes: The Mountain Opens https://qualla.com/2000-izu-islands-earthquakes/ Photo credit Alexrk2, CC BY-SA 3.0. On July 8, the event everyone feared arrived: Mount Oyama, the 759-meter peak at the center of Miyake-jima, erupted. The initial blasts were phreatic -- steam-driven explosions as groundwater met magma. But the eruptions kept coming, and with each one the summit collapsed further...

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]]> Mon, 16 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/xn50-2000-izu-islands-earthquakes-the-mountain-opens.mp3 0:06 4 full 2000 Izu Islands Earthquakes: The Science Beneath the Chaos https://qualla.com/2000-izu-islands-earthquakes/ Photo credit Alexrk2, CC BY-SA 3.0. The 2000 Izu Islands earthquake swarm became a landmark case study in the relationship between volcanic activity and seismicity. Researchers demonstrated that the swarm was driven by magma intrusion beneath Miyake-jima -- molten rock pushing upward through the crust, fracturing e...

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Image: Alexrk2 | CC BY-SA 3.0

]]> Mon, 16 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/xn50-2000-izu-islands-earthquakes-the-science-beneath-the-chaos.mp3 0:06 5 full 2000 Izu Islands Earthquakes: Return to an Altered Island https://qualla.com/2000-izu-islands-earthquakes/ Photo credit Alexrk2, CC BY-SA 3.0. On February 1, 2005, residents were finally permitted to return to Miyake-jima permanently. They came home to an island transformed. Where a mountain peak once stood, a vast caldera yawned open. Sulfur dioxide continued streaming from the crater, and for years residents were requ...

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]]> Mon, 16 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/5/0/2000-izu-islands-earthquakes-wp/xn50-2000-izu-islands-earthquakes-return-to-an-altered-island.mp3 0:06 6 full