In April 2024, scientists from the OHA-GEODAMS project observed the first direct
GS1History · Society · Geography· Physical geography (landforms, oceans, climate)· Prelims·
Why in news
Scientists from the OHA-GEODAMS project observed the first direct in-situ seafloor spreading event along the Southeast Indian Ridge in April 2024.
Background
The event involved earthquakes, seabed subsidence, and magma movement resulting in over 160 million cubic metres of lava creating new ocean floor. The findings were published in a Nature study on July 8, 2026.
Facts for Prelims
- PlaceSoutheast Indian Ridge: A mid-ocean ridge located in the Indian Ocean where tectonic plates diverge.
- S&TOHA-GEODAMS: A project utilizing in-situ instruments to monitor seafloor spreading and tectonic activity.
- FactVolume of lava: Over 160 million cubic metres of lava were created during the observed spreading event.
For Mains
Q. Discuss the geological significance of mid-ocean ridge spreading in the context of plate tectonics and the formation of the Earth's oceanic crust.
Dimensions to cover in your answer
- Tectonic dynamics: Real-time observation of magma-driven crustal formation and plate divergence mechanics.
- Geophysical monitoring: Advancements in in-situ seafloor instrumentation for tracking seismic and volcanic activity.
- Lithospheric evolution: Understanding the rate of seafloor spreading and its impact on global ocean basin geometry.
Keywords: Plate Tectonics · Seafloor Spreading · Magmatic Activity · Lithospheric Evolution · Geophysical Monitoring
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