Osore-yama Volcano
Updated: Nov 9, 2025 01:40 GMT -
stratovolcano
Honshu (Japan), 40.28°N / 141.12°E 
Summit height: 879 m / 2,884 ft
Current status: normal or dormant (1 out of 5)
Osore-yama volcano (also known as Osorezan) is an active stratovolcano on the Shimokita Peninsula in northernmost Honshu, Japan.
It is known locally also as Yake-yama, or "Burning Mountain". Older residents reported that large fires and clouds were sometimes seen from the summit, but the only confirmed historic activity took place around 1787.
Earthquake swarms have been documented at Osore-yama during the second half of the 20th century, and magma bodies have been detected beneath the volcano.
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Osore-yama volcano eruptions: 1787 or before
Latest nearby earthquakes
| Date and Time | Mag / Depth | Distance / Location | |||
|---|---|---|---|---|---|
| Nov 7, 12:44 am (GMT +9) | 0.5 3.7 km | 24 km (15 mi) to the S | Japan: Northern Iwate Pref | Info | |
| Nov 6, 05:59 pm (GMT +9) | 0.2 10.4 km | 26 km (16 mi) to the SE | Japan: Northern Iwate Pref | Info | |
| Wednesday, November 5, 2025 GMT (3 quakes) | |||||
| Nov 5, 07:42 pm (GMT +9) | 0.1 5.5 km | 7.1 km (4.4 mi) to the S | Japan: Northern Iwate Pref | Info | |
| Nov 5, 06:46 pm (GMT +9) | 1.0 9.8 km | 7.6 km (4.7 mi) to the SE | Japan: Northern Iwate Pref | Info | |
| Nov 5, 03:34 pm (GMT +9) | 1.9 7 km | 29 km (18 mi) to the S | Japan: Northern Iwate Pref | Info | |
| Tuesday, November 4, 2025 GMT (2 quakes) | |||||
| Nov 5, 08:32 am (GMT +9) | 3.0 4.1 km | 24 km (15 mi) to the SE | Japan: Northern Iwate Pref I FELT IT | Info | |
| Nov 4, 06:03 pm (GMT +9) | 0.4 7.9 km | 11 km (7.1 mi) to the NE | Japan: Northern Iwate Pref | Info | |
| Saturday, November 1, 2025 GMT (1 quake) | |||||
| Nov 1, 06:56 pm (GMT +9) | 1.2 11 km | 15 km (9.1 mi) to the NE | Japan: Northern Iwate Pref | Info | |
| Thursday, October 30, 2025 GMT (2 quakes) | |||||
| Oct 30, 09:50 pm (GMT +9) | 1.1 92 km | 14 km (8.8 mi) to the E | Japan: Northern Iwate Pref | Info | |
Background
Osore-yama contains a 5 km wide caldera partly filled by a shallow lake draining through the northern caldera wall.Dissected lava domes ring the caldera floor. The andesitic-to-dacitic Osore-yama is largely Pleistocene in age, with activity dating back about 800,000 years. The last identified distal tephra deposit was erupted during the late Pleistocene. The only report of historical activity was in a Tohoku district travel document published in 1787, which stated that Yake-yama in Mutsu country (Osore-yama) had erupted.
(Source: Smithsonian / GVP volcano information)
Significant volcanic eruptions: Osore-yama volcano
In the past 10,000 years, Osore-yama has had only one confirmed historic eruption in 1787.
The table below lists all known eruptions (date in bold face) of Osore-yama volcano in historic times and during the past 10,000 years. Updates on the most recent volcanic activity of Osore-yama can be found on the news page of Osore-yama volcano.
| Date | Note | VEI | Deaths | Damage | |
|---|---|---|---|---|---|
Historical obs./docs. | ? | ||||
Remark:
Our list of volcanic eruptions closely follows the database of eruptions of the Smithsonian's Global Volcanism Project (GVP), the internationally most recognized data source for volcanic eruptions, but also includes significant eruptive episodes or related volcano events. "Volcanic eruptions" are usually to be understood as sequences of individual eruptive episodes that can follow each other, or even overlap (if several vents are involved), and can last many years, decades or even longer. For example, the current activity of Stromboli volcano is understood as a single eruption that has been ongoing since 1934.
Sources: NOAA National Centers for Environmental Information (NCEI), Global Significant Volcanic Eruptions Database. doi:10.7289/V5TD9V7K | Global Volcanism Project / Smithsonian Institution
Osore-yama Volcano FAQ
+When was the last eruption of Osore-yama volcano?
The last confirmed eruption of Osore-yama occurred in 1787.
+How often does Osore-yama volcano erupt?
Since 1787, Osore-yama volcano has had at least 1 historically documented eruptions. This means that it erupts on average every 238 years.
Latest satellite images
Osore-yama Volcano Maps
Below is a selection of maps showing the location and surroundings of the volcano at various resolutions based on aerial-imagery / terrain maps. Feel free to use them for non-commercial purposes on your blog or website as long as you credit them with a link back to this page (click to copy it).
Satellite/aerial-type map of Osore-yama volcano (world scale)
Terrain-type map of Osore-yama volcano (world scale)
Satellite/aerial-type map of Osore-yama volcano (region scale large)
Terrain-type map of Osore-yama volcano (region scale large)
Satellite/aerial-type map of Osore-yama volcano (region scale medium)
Terrain-type map of Osore-yama volcano (region scale medium)
Satellite/aerial-type map of Osore-yama volcano (region scale small)
Terrain-type map of Osore-yama volcano (region scale small)
Satellite/aerial-type map of Osore-yama volcano (local scale large)
Terrain-type map of Osore-yama volcano (local scale large)
Satellite/aerial-type map of Osore-yama volcano (local scale medium)
Terrain-type map of Osore-yama volcano (local scale medium)
Satellite/aerial-type map of Osore-yama volcano (local scale small)
Terrain-type map of Osore-yama volcano (local scale small)
Satellite/aerial-type map of Osore-yama volcano (scale of 10s of km)
Terrain-type map of Osore-yama volcano (scale of 10s of km)
Satellite/aerial-type map of Osore-yama volcano (scale of 20-40 km)
Terrain-type map of Osore-yama volcano (scale of 20-40 km)
Satellite/aerial-type map of Osore-yama volcano (scale of approx. 10-20 km)
Terrain-type map of Osore-yama volcano (scale of approx. 10-20 km)
Satellite/aerial-type map of Osore-yama volcano (scale of 5-10 km)
Satellite/aerial-type map of Osore-yama volcano (scale of few kilometers)
