Daniel Trugman
dtrugman2.bsky.social
Daniel Trugman
@dtrugman2.bsky.social
Assistant professor, seismologist & data cruncher; also interested in climbing / skiing / hiking / biking / running / tennis / politics. Views are mine.
Most seismologists I work with use the term "absolute earthquake location" to refer to the position of the event in geographic coordinates and to distinguish this from "relative earthquake location" in relation to other nearby events. Not to imply "correct" or "accurate" by the word absolute...
December 24, 2024 at 5:11 AM
Yeah! I've heard reports of localized areas of low (as well as very high) ground motions from the 2023 event. It seems plausible for a single earthquake, but the curious thing about these rocks is that they have lived through many events. While they are only "semi-precarious", it is still a puzzle.
December 17, 2023 at 5:45 AM
Right, exactly, possibly all three at once. There may be a general issue with the ground motion model used, a local issue with the particular source-site path the seismic waves traverse, and/or an issue with quantifying the fragility of those particular rocks.
December 17, 2023 at 2:14 AM
Interesting thought; in this case the most likely cause of the discrepancy is not due to the rate of large earthquakes but rather the intensity of ground motion caused by those earthquakes. It is also quite possible that these rocks are less fragile than they appear for reasons we don't understand.
December 16, 2023 at 10:36 PM