Category: SRL

4 November 2020–An earthquake of magnitude 8.0 or larger will almost always cause strong shaking, but a new study suggests that smaller earthquakes—those around magnitude 5.5 or so–are the cause of most occurrences of strong shaking at a 60-kilometer (37-mile) distance. Small earthquakes are expected to produce relatively weak shaking, … Continue Reading »

7 October 2020–An unusually shallow earthquake triggered by hydraulic fracturing in a Chinese shale gas field could change how experts view the risks of fracking for faults that lie very near the Earth’s surface. In the journal Seismological Research Letters, Hongfeng Yang of The Chinese University of Hong Kong and … Continue Reading »

30 September 2020–The 2019 Ridgecrest earthquake sequence has revealed areas of the Los Angeles basin where the amplification of shaking of high-rise buildings is greatest, according to a new report in Seismological Research Letters. The 6 July 2019 magnitude 7.1 earthquake, located 200 kilometers (124 miles) north of Los Angeles, … Continue Reading »

5 August 2020–The heights of La Soufrière de Guadeloupe volcano can be hellish, sweltering at more than 48 degrees Celsius (120 degrees Fahrenheit) and swathed in billows of acidic gas. Researchers would like to monitor gas and steam eruptions at its summit, to learn more about the volcano’s explosive potential, … Continue Reading »

29 July 2020–Aaron Lojewski, who leads aurora sightseeing tours in Alaska, was lucky enough to photograph a “eruption” of brilliant pink light in the night skies one night in February. The same perturbations of the Earth’s magnetic field that lit up the sky for Lojewski’s camera were also captured by … Continue Reading »