[CLSTR]
< Back to situations

We’ll email you as it develops, and you can follow the whole thread from day one.

[SITUATION] · [ACTIVE]

5 clusters · 10 sources · 20 days · First seen · Last updated

Categories: TECHNOLOGY · INTERNATIONAL

Southeast Indian Ridge seafloor dynamics – new data

Entities: magma reservoir · German scientists · Nature · Indian Ocean · Southeast Indian Ridge

Overview

The abrupt opening of a 100‑km segment of the Southeast Indian Ridge on 26 April 2024 released about 160 million m³ of lava and drove seafloor advance at up to five centimetres per minute for six days before slowing to roughly 1.2 cm day⁻¹, with part of the ridge subsiding several metres. A French‑led team near Amsterdam Island recorded a 16‑day sequence of earthquakes, larger tremors, vertical subsidence of up to 4.2 m and lateral displacement over one metre, confirming the eruption volume and providing a real‑time view of crust formation.

A later study published in *Nature* (2026) presented high‑resolution measurements from an underwater observatory about two kilometres deep on the edge of a rift valley. The instruments captured the same rapid subsidence—up to 4.2 m within six days—and revealed an initial drop of roughly 1.2 m in just one hour, recorded by hydrophones, acoustic ranging devices and pressure sensors. These observations directly link the deformation to a shallow magma reservoir draining during the intrusion, constituting the first detailed, real‑time record of magma‑driven subsidence on the deep‑sea floor.

Together, the multi‑instrument records delineate the complete sequence from magma intrusion and eruption to seafloor uplift, fault slip, and subsequent collapse, offering unprecedented insight into plate‑tectonic spreading at mid‑ocean ridges.

Timeline

  1. 3 days ago

    [TECHNOLOGY] 2 sources
    Scientists Record Major Seabed Subsidence in Indian Ocean

    German scientists at a deep‑sea observatory on the Southeast Indian Ridge recorded a 4.2 m seabed collapse over six days after a magma intrusion on 26 April 2024, a first direct measurement of such an event, as

  2. 9 days ago

    [INTERNATIONAL] 2 sources
    Indian Ocean seabed drops several meters after magma intrusion

    Indian Ocean seabed sank up to 4.2 m over six days after a magma intrusion, recorded by deep‑sea instruments and reported in *Nature*.

  3. 18 days ago

    [TECHNOLOGY] 2 sources
    Scientists Observe Real-Time Formation of New Oceanic Crust in the Indian Ocean

    French scientists monitoring the Southeast Indian Ridge recorded a 16‑day seafloor expansion, with 160 million m³ of lava forming new oceanic crust, a first real‑time observation published in *Nature*.

  4. 23 days ago

    [TECHNOLOGY] 2 sources
    Scientists Observe Record Seafloor Expansion on Indian Ocean Ridge

    Scientists directly observed a seafloor expansion of over a meter at the Indian Ocean’s southeast ridge, measuring a 4.2 m shift after an April 2024 quake, advancing understanding of oceanic crust formation.

  5. 23 days ago

    [INTERNATIONAL] 2 sources
    Southeast Indian Ridge Rift Captured Live as Ocean Floor Splits and Erupts Lava

    A 100‑km array of instruments captured the Southeast Indian Ridge rift on 26 April 2024, measuring a 4.2‑m opening and a 160 million m³ lava eruption—the first real‑time view of new oceanic crust creation.

Sources

arroyodiario.com.ar · finalweapon.net · focus.it · harzkurier.de · m.abendblatt.de · m.tlz.de · metropoles.com · nrz.de · startup.mandiner.hu · thesheffieldpress.com