Healy Volcano
Updated: Mar 29, 2024 10:45 GMT -
Submarine volcano 980 m / 3,215 ft
New Zealand, -35°S / 178.97°E
Current status: normal or dormant (1 out of 5)
New Zealand, -35°S / 178.97°E
Current status: normal or dormant (1 out of 5)
[smaller] [larger]
Healy volcano eruptions: 1360 ± 75 years
Latest nearby earthquakes
Time | Mag. / Depth | Distance / Location | |||
Mar 21, 02:12 am (Auckland) Mar 20, 14:12 GMT | 3.6 300 km | 15 km (9.1 mi) to the NE | New Zealand | Info |
Background
Healy submarine volcano lies along the South Kermadec Ridge and consists of an elongated edifice with a 3 x 4 km wide caldera at the NE end whose rim reaches to 1150 m below sea level. A smaller caldera lies to the SW, and a satellitic cone, Cotton volcano, rises to 980 below sea level at the SW end of the 15-km-long complex. The flat-lying floor of the larger NE caldera lies 250-400 m below the caldera rim. Rhyodacitic pumice deposits mantle the caldera floor and walls, as well as the flanks of the volcano. Active hydrothermal venting has been observed on the lower part of the southern caldera wall. The roughly 590-year-old sea-rafted Loisels Pumice deposit found in many Holocene beach sequences of North Island, New Zealand and as far away as the Chatham Islands, 650 km east of New Zealand, is chemically and texturally similar to pumices from Healy caldera.---
Smithsonian / GVP volcano information