Iwo-jima News

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 It seems that the volcano entered a new eruptive sequence.

Judging from the latest Sentinel-2's thermal radiation from 19 July, a new submarine explosive activity started to take place approx. 600 meters off the coast of Okinahama Beach, located on the south of the island.
Whether the activity will continue and escalate into phreatomagmatic-type, is not clear yet. Phreatomagmatic activity (also known as surtseyan) means that erupting magma reacts with external water, e.g. groundwater, lake water, sea water etc.
The recent eruption phase occurred between late October and mid-December last year, during which the new J-shaped island grew to the south of the island. However, the morphology of the island was affected by strong ocean wave erosion. Since the edifice consisted solely of loose, juvenile lava material, it was highly prone to collapse into the water and gradually disappeared from view.

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