Qualla: Naruko Volcano https://qualla.com/naruko-volcano 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/u/h/naruko-volcano-wp/hero-small.webp Qualla: Naruko Volcano https://qualla.com/naruko-volcano Naruko Volcano: Introduction https://qualla.com/naruko-volcano/ Photo credit Batholith, Public domain. In 837 AD, the ground around a mountain in northern Miyagi Prefecture began to shake. The trembling lasted days. Then the mountain exploded, sending boiling water cascading downhill like a river. The terrified villagers reported the event to the imperial court in Kyoto, which responded by enshrining a hot spring god at the site. The eruption, recorded in the Shoku Nihon Koki chronicle, gave the volcano the name it still carries: Naruko, derived from 'narugou' -- the place with a trembling sound. Nearly twelve centuries later, that trembling has produced one of Japan's most celebrated hot spring districts, a lake so acidic that nothing can live in it, and a caldera landscape that hides in plain sight.

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Image: Batholith | Public domain

]]> Tue, 17 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/u/h/naruko-volcano-wp/xnuh-naruko-volcano-intro.mp3 0:06 1 full Naruko Volcano: The Caldera That Hides in Plain Sight https://qualla.com/naruko-volcano/ Photo credit Batholith, Public domain. Naruko is a stratovolcano, but it does not look like one. Unlike Mount Fuji's iconic cone, Naruko's defining feature is a broad caldera roughly seven kilometers wide, formed by two massive pyroclastic flows 73,000 and 45,000 years ago. Four dacite lava domes rise from the caldera...

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Image: Batholith | Public domain

]]> Tue, 17 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/u/h/naruko-volcano-wp/xnuh-naruko-volcano-the-caldera-that-hides-in-plain-sight.mp3 0:06 2 full Naruko Volcano: A Lake Where Nothing Lives https://qualla.com/naruko-volcano/ Photo credit Batholith, Public domain. Katanuma sits in the center of the caldera, an emerald pool enclosed by the four lava domes. It formed roughly 18,000 years ago when an explosive eruption blasted apart one of the domes, leaving a crater that filled with volcanically heated, mineral-laden water. The lake has a pH...

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]]> Tue, 17 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/u/h/naruko-volcano-wp/xnuh-naruko-volcano-a-lake-where-nothing-lives.mp3 0:06 3 full Naruko Volcano: Four Hundred Springs and a Squeaking Doll https://qualla.com/naruko-volcano/ Photo credit Batholith, Public domain. The same volcanic system that created Katanuma also produced the Naruko Onsen hot spring district, one of the largest in Japan. More than four hundred individual springs feed five distinct onsen villages -- Naruko, Higashi Naruko, Kawatabi, Nakayamadaira, and Onikobe -- offering ...

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]]> Tue, 17 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/u/h/naruko-volcano-wp/xnuh-naruko-volcano-four-hundred-springs-and-a-squeaking-doll.mp3 0:06 4 full Naruko Volcano: Still Trembling https://qualla.com/naruko-volcano/ Photo credit Batholith, Public domain. The 837 eruption remains the only historically recorded eruption at Naruko, and geologists classify it as a relatively modest phreatic event -- a steam explosion that collapsed a lava dome rather than producing fresh magma. But the volcano has not gone quiet. Volcanic gas continu...

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]]> Tue, 17 Feb 2026 00:00:00 GMT https://qualla.com/_m/x/n/u/h/naruko-volcano-wp/xnuh-naruko-volcano-still-trembling.mp3 0:06 5 full