A record-breaking deep earthquake registered in May 2025 offshore of Japan likely was not a tectonic event, but triggered by a mineralogical shift in Earth’s mantle.

A re-examination of the 2015 Bonin Islands earthquake disproved earlier claims of a record-breaking deep aftershock in the ...

“We think that the anomalies in the lower mantle have a variety of origins,” says Schouten. “It could be either ancient, silica-rich material that has been there since the formation of the ...

Based on previous geodynamic simulations and seismological results, the researchers inferred that the N-S FVDs at depths of 700–900 km reflect the remnant Pacific lower mantle flow field at ...

New measurements suggest mysterious continent-sized masses in our planet’s lower mantle may be extremely stable features ...

The magnitude 7.9 Bonin Islands earthquake sequence, which ruptured deep within the earth near the base of the upper mantle, did not include an aftershock that extended to record depths into the lower ...

One previous study of the Bonin Islands earthquake reported a foreshock sequence for the event, while a second study detected a potentially record-breaking deep aftershock in the lower mantle.

Drewitt, J. W. E., Walter, M. J., Zhang, H., McMahon, S. C., Edwards, D., Heinen, B. J., Lord, O. T., Anzellini, S., & Kleppe, A. K. (2019). The fate of carbonate in ...

The processes that form continental crust from the denser basaltic rocks of the upper mantle may make the lower lithosphere ...

The potential compositional boundary was typically put at 660 km depth, corresponding to the major seismic discontinuity that marks the boundary between the upper mantle and lower mantle.