TSR | SSA Staging

Claims for the World’s Deepest Earthquake Challenged by New Analysis

Published on 22 January 202529 May 2025 | Journals, News, TSR

photo of Miyanohama Beach in the Bonin Islands

22 January 2025—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 mantle, according to a study in The Seismic Record. When Hao Zhang of the University … Continue Reading »

Plugged Wells and Reduced Injection Lower Induced Earthquake Rates in Oklahoma

Published on 13 November 202429 May 2025 | Journals, News, TSR

Difference between pre-plug back and post-plug back depth for wells that were initially injecting into the Precambrian basement or lower Arbuckle. Inset shows the location of these plugged back wells (colored triangles) and other disposal wells (grey triangles) within area of interest. Inset cross-section shows schematic of a disposal well that was plugged back out of the lowermost portion of the Arbuckle. | Skoumal et al. (2024) TSR

13 November 2024–Wastewater injection resulting from oil and gas production in Oklahoma caused a dramatic rise in seismic activity in the state between 2009 and 2015. But regulatory efforts to backfill some injection wells with cement and reduce injection volumes have been effective in lowering the state’s induced earthquake rate, … Continue Reading »

Closer Look at New Jersey Earthquake Rupture Could Explain Shaking Reports

Published on 1 October 202429 May 2025 | Journals, News, TSR

Taylor's Mill in New Jersey after 5 April 2024 earthquake.

1 October 2024–The magnitude 4.8 Tewksbury earthquake surprised millions of people on the U.S. East Coast who felt the shaking from this largest instrumentally recorded earthquake in New Jersey since 1900. But researchers noted something else unusual about the earthquake: why did so many people 40 miles away in New … Continue Reading »

Greenland Megatsunami Led to Week-Long Oscillating Fjord Wave

Published on 8 August 202429 May 2025 | Journals, News, TSR

Aerial overview of the study region, with the landslide location (yellow star) on the southern shore of the Dickson fjord. The green box is a simplified model of the seiching effect. Phase 1 corresponds to the landslide, Phase 2 marks the entrance of the landslide into the fjord, and Phase 3 is the megatsunami with water waves initiating a seiching process. | TSR (2024) Carrillo-Ponce et al.

8 August 2024–In September 2023, a megatsunami in remote eastern Greenland sent seismic waves around the world, piquing the interest of the global research community. The event created a week-long oscillating wave in Dickson Fjord, according to a new report in The Seismic Record. Angela Carrillo-Ponce of GFZ German Research … Continue Reading »

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

Published on 21 February 202430 May 2025 | Journals, News, TSR

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 »

Seismic and Infrasonic Signals used to Characterize Nord Stream Pipeline Events

Published on 3 January 20242 June 2025 | Journals, News, TSR

3 January 2024–Seismic events that coincided with sudden drops in pressure within the Nord Stream 1 and 2 natural gas pipelines in September 2022 alerted the world to the rupture of pipelines in the western Baltic Sea. The suspected act of sabotage, which reportedly used explosive charges to rupture the … Continue Reading »