Strange Seismic Wave Arrivals Lead to Discovery of Overturned Slab in the Mediterranean

Map of seismic stations and the deep Granada earthquake. Red triangles indicate stations for studying the low velocity layer on the slab.

21 February 2024–Strange seismic wave arrivals from a 2010 earthquake under Spain were the clues that led to an unexpected discovery beneath the western Mediterranean: a subducted oceanic slab that has completely overturned. The waveforms paint a picture of a slab that descended rapidly into the Earth’s mantle and flipped … Continue Reading »

Q&A with TSR Editor-in-Chief Keith Koper

4 December 2023–As The Seismic Record nears its three-year anniversary, we asked Editor-in-Chief Keith Koper to talk about how the journal has evolved and what to expect next in its pages. SSA: The Seismic Record will celebrate its three-year anniversary in 2024. Why do you think the journal has been … Continue Reading »

At Work: Jonathan Ajo-Franklin

15 January 2021–In applied geophysics, studying the movements of the Earth goes far beyond the seismic signatures of natural earthquakes. During his career, Jonathan Ajo-Franklin has worked on permafrost, CO2 storage, geothermal energy, aquifer systems and more. “My interests always lie in the intersection between what people do to the … Continue Reading »