Az Aira-kaldera (japánul 姶良カルデラ [Aira-Karudera]) egy hatalmas, 13×23 kilométeres átmérőjű vulkáni kaldera Japán déli részén, Kjúsú szigetének legdélibb csücskében, a Kagosimai-öböl végében. Between 2009 and 2013, there was evidence of inflation in the Aira system. Eruption of the voluminous Ito pyroclastic flow accompanied formation of the 17 x 23 km caldera about 22,000 years ago. The connection between Aria and Kirishima represents the clearest example of volcano interconnectivity revealed by geodetic monitoring.
On 28 July a very small eruption cloud rose 200 m above Minami-Dake Crater. The Tokyo VAAC reported that during 10 and 12 May plumes rose to altitudes of 2.4-5.5 km (8,000-18,000 ft) a.s.l. De Aira-caldera is een 17 x 23 km brede caldera in het zuiden van het Japanse eiland Kyūshū. and PaleomagnetismBiological The major city of Kagoshima and the 13,000 year old Sakurajima volcano lies within the caldera. The Tokyo VAAC reported that during 2-7 October plumes rose to altitudes of 1.2-3.7 km (4,000-12,000 ft) a.s.l. A series of sub-plinian events then occurred from January 19th to the 31st (Brothelande E., et al, 2018). During 27-29 March plumes rose to altitudes of 1.8-2.4 km (6,000-8,000 ft) a.s.l. The Kinko Bay is located in Kagoshima near the Sakurajima volcano. The Tokyo VAAC reported that during 17-23 September plumes rose to altitudes of 1.8-3.4 km (6,000-11,000 ft) a.s.l. On 26 April a pilot observed an ash plume that rose to an altitude of 2.7 km (9,000 ft) a.s.l. The volcano has been in near continuous eruption since 1955. and drifted NE, SE, and E. The Alert Level remained at 3 (on a scale of 1-5).JMA reported that during 23-27 June six explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m. During 27-30 June there were four explosions.
Ist der Vulkan weiterhin aktiv, können sich auf dem Boden einer Caldera erneut Vulkankegel bilden, wie dies beispielsweise beim Vesuv oder der Aira-Caldera geschehen ist.
and drifted SE, SW, N, and NE.Please log in using one of these methods to post your comment: On most days faint to clear incandescence was visible using a high-sensitivity camera at night. and drifted W, SE, and E. On 13 May a pilot observed an ash plume that rose to an altitude of 1.2 km (4,000 ft) a.s.l.JMA reported that during 28 April-2 May four explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 500 m. Incandescence from the crater was detected at night during 28-30 April. Aira Caldera- Sakurajima Volcano from space. The area shown measures 37.5 kilometers by 46.5 kilometers (23.3 miles by 28.8 miles). and drifted NW, N, E, SE, and S. The Alert Level remained at 3 (on a scale of 1-5).JMA reported an explosion from Showa Crater at Aira Caldera’s Sakurajima volcano on 30 July that ejected ballistics 300-500 m from Showa crater and six other explosions on 31 July accompanied by volcanic earthquakes and volcanic tremor. Together with a large pumice fall, these amounted to more than 400 km3 of tephra (VEI 7).The Aira caldera in the northern half of Kagoshima Bay contains the post-caldera Sakurajima volcano, one of Japan’s most active. The smaller Wakamiko caldera was formed during the early Holocene in the NE corner of the Aira caldera, along with several post-caldera cones. Several hundred cubic kilometres of ash and pumice were ejected, causing the magma chamber underneath the erupting vents to collapse. The Alert Level remained at 3 (on a scale of 1-5).During 20-26 August JMA reported 17 explosions from Showa Crater at Aira Caldera’s Sakurajima volcano that were accompanied by volcanic earthquakes and volcanic tremor, and which ejected ballistics 500-800 m away. The Alert Level remained at 3 (on a scale of 1-5). Sustained eruptions from the crater were recorded on 10 and 11 September and nighttime incandescence was detected during 11-16 September.During 10-16 September JMA reported ash eruptions, causing the Tokyo VAAC to issue regular advisories; however, ash was not visible in satellite images.During 1-9 September JMA maintained Alert Level 3 for Aira Caldera’s Sakurajima volcano. Plumes drifted SE on 10 April.JMA reported that during 31 March-4 April two explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m. Incandescence from the crater was occasionally detected at night. In general, volcanic earthquakes decreased and tremor increased. The first phase (eruption climax) was accompanied by a strong co-eruptive deflation. Incandescence from Showa Crater was visible at night during 2-3 October. The largest volume was represented by Aira pyroclastic eruptions which produced more than 400km3 of rhyolitic tephra at 29 ka consisting mainly of Ito pyroclastic flow and regional Osumi pumice fall and A-T ash fall.
There were 23 explosions recorded from Showa crater from 1 to 4 September; during 5-7 September there were 18 explosions.During 3-7 September JMA reported ash eruptions, causing the Tokyo VAAC to issue regular advisories; however, ash was not visible in satellite images.
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