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- TL;DR Summary
- Off Africa, a magma pool drained, flowed up a dyke, when horizontally, and evetually up to make an underwater volcano. The source of the magma (magma chamber), then could not support the overlying crust. Then, a slow limited magma roof collapse, caused a series of earthquakes. Under-supported, overlying crust (crunchy) cracked, to accommodate its reduced support. Then the magma chamber roof slowly collapsed, causing unusual magma chamber resonances. Overlying land sank.
I find this interesting. A pretty detailed description, of a complex geological series of events, that can't be directly seen.
Here's my summary:
In 2018 an usual humming was picked up by seismic equipment an island off Africa, a magma pool drained, flowed up a dyke, when horizontal, and then up to make an underwater volcano. The source of the magma (magma chamber), then could not support the overlying crust. In a slow, limited magma roof collapse, caused a series earthquakes. Under-supported, overlying crust (crunchy) cracks, accommodating its reduced support. This leads to the magma chamber roof's slow collapse, causing unusual magma chamber resonances. Overlying land sank.
Here is an open access link to the paper:
Nature Geoscience | VOL 13 | January 2020 | 87–93 | www.nature.com/naturegeoscience 87
Abstract:
Summary:
Here's my summary:
In 2018 an usual humming was picked up by seismic equipment an island off Africa, a magma pool drained, flowed up a dyke, when horizontal, and then up to make an underwater volcano. The source of the magma (magma chamber), then could not support the overlying crust. In a slow, limited magma roof collapse, caused a series earthquakes. Under-supported, overlying crust (crunchy) cracks, accommodating its reduced support. This leads to the magma chamber roof's slow collapse, causing unusual magma chamber resonances. Overlying land sank.
Here is an open access link to the paper:
Nature Geoscience | VOL 13 | January 2020 | 87–93 | www.nature.com/naturegeoscience 87
Abstract:
Summary: