Volcanoes & Earthquakes - new app for Android
Guaranteed tours
8-16 may 2021: From Stromboli to Etna - Sicila and Eolian Islands (Italy)
24 jun - 8 jul 2021: Colors of Iceland: Fire, Earth, Ice and Water - Iceland
30 jul - 13 ago 2021: Colors of Iceland: Fire, Earth, Ice and Water - Iceland
: espacios disponibles / : garantizada / : pocos espacios a la izquierda / : una reserva con antelación
Latest news
dom, 2 sep 2012, 12:05
Aerial monitoring conducted by the JCG on August 26th. Red circle indicates discolored sea water area located around southeastward from the southern edge of Aogashima. (JMA)
Monitoreo aéreo llevado a cabo por la guardia costera de Japón (JCG) el 26 de agosto reveló un área circular previamente incumplido de luz verde agua descolorida medir aproximadamente 900 m de diámetro aproximadamente 1.300 m al sureste del extremo sur de la isla de Aogashima a una profundidad de 63 m. Grandes áreas de agua descolorida marrón claro y de color verde claro fueron vistas alrededor de la costa norte de la isla, y agua descolorida marrón claro y de color verde claro también fueron vistos alrededor de su costa sureste, estas decoloraciones habían sido observadas previamente en pequeña escala. ... leer todo

Aoga-shima volcano

estratovolcán 423 m / 1,388 ft
Izu Islands, Japan, 32.45°N / 139.76°E
Current status: normal or dormant (1 out of 5)
Last update: 2 Sep 2012

Aoga-shima volcano (青ヶ島, Aogashima) is a stratovolcano forming a beautiful small 2.5 x 3.5 km island with steep cliffs in the Izu island chain, 300 km south of Tokyo.
The dominantly basaltic Aoga-shima volcano contains a complex caldera (Ikenosawa Crater) with a diameter of 1.7 x 1.5 km. 2 cones were built inside the caldera during the volcano's last eruptions in 1781-85.
Activity of Aogashima volcano includes pyroclastic flows and lava flows from both summit and flank vents.

Show interactive Map
Typical eruption style: explosive
Erupciones del volcán Aoga-shima: 1781-85, 1670-80, 1652, 600 BC ± 200 years, 1100 BC ± 300 years, 1200 BC ± 50 years, 1800 BC ± 100 years

Latest nearby earthquakes

Fecha / HoraRevista / ProfundidadDistanciaUbicación
Tue, 2 Mar 2021 (GMT) (1 terremoto)
2 mar 2021 13:58 (GMT +9) (2 Mar 2021 04:58:32 GMT)
3.3

5.6 km - More
149 kmOcéano Pacífico Norte, 116 km al este de Hachijojima, Japón
Sun, 28 Feb 2021 (GMT) (1 terremoto)
1 mar 2021 03:11 (GMT +9) (28 Feb 2021 18:11:31 GMT)
3.1

18 km - More
110 kmOcéano Pacífico Norte, Japón

Background

The oldest part of Aoga-shima volcano was the Kurosaki stratovolcano in the NW part of the island. The present-day stratovolcano grew later in the SE part of the island. A 1-1.5 km wide crater or caldera formed on the SE flank of the main cone.
About 3000 years ago a powerful explosive eruption produced pyroclastic surges that swept over the entire island, and during the activity in the following 600 years, most of the crater on the SE side was filled by lava flows and scoria deposits. Renewed collapse and possibly a debris avalanche re-formed the caldera and created the present-day Ikenosawa Crater, which also was the site of the historic activity.
(Source: Smithsonian / GVP volcano information)

1781-85 eruption (Tenmei eruption)
Following a year of increased hydrothermal activity since 1780, earthquakes and small ash eruptions occurred on 3 and 4 May 1781. On 10 and 11 April 1783, a strong strombolian-lava fountain eruption started and built a new scoria cone inside the crater. 61 houses were burned and there were 7 fatalities.
Similarly, on 18 April 1785, strong strombolian eruptions resumed and built a second cone in the crater. The eruption caused 130-140 fatalities (although details are not known), while 163 residents escaped to Hachijo-jima Island. The eruption also produced lava flows inside Ikenosawa Crater.
From historic documents, it seems that by 1787 the eruption had ended.
---
Source:
Takada et al (1992) "Geology of Aogashima Volcano, Izu Islands, Japan", Bulletin of the Volcanological Society of Japan 37(5), pp. 233-250

See also: Sentinel hub | Landsat 8

Más en VolcanoDiscovery

Why is there advertising on this site?
Copyrights: VolcanoDiscovery y otras fuentes como se ha señalado.
Uso de material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.