Stormrider

“Know Where You Are,” Ch. 52 of The Last Lecture by Randy Pausch; “ ‘What can you do for us?’ That was the greeting I received from a 27-year-old Imagineer who was given the job of babysitting me during my sabbatical at Disney. I had arrived in a place where my academic credentials meant nothing.”

“Fracture mode influence on surface rupture: The 2019 M 7.1 Ridgecrest earthquake, California, USA” in Geology by Nevitt et al. doi.org/10.1130/G530...

Getting low-altitude photos of the fresh surface fault ruptures; this photo of me is by Danielle Verdugo Madugo (CGS)

“Fracture mode influence on surface rupture: The 2019 M 7.1 Ridgecrest earthquake, California, USA” in Geology by Nevitt et al. doi.org/10.1130/G530...

Low altitude aerial photos are available, to go along with the lidar: www.sciencebase.gov/catalog/item...

“Fracture mode influence on surface rupture: The 2019 M 7.1 Ridgecrest earthquake, California, USA” in Geology by Nevitt et al. doi.org/10.1130/G530...

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San Francisco has invested $20 billion to increase its seismic resilience since the 1989 Loma Prieta earthquake - see report (link below) for more information. Thank you to all involved in this effort and the rate payers & taxpayers who funded this vital work. Great job! www.sf.gov/preparing-ou...

This includes SF Bay Area (more broadly than City of SF only).

San Francisco has invested $20 billion to increase its seismic resilience since the 1989 Loma Prieta earthquake - see report (link below) for more information. Thank you to all involved in this effort and the rate payers & taxpayers who funded this vital work. Great job! www.sf.gov/preparing-ou...

I’m not aware of any similar tallies having been done for other cities at significant risk from earthquakes. I hope more such studies will be done - perhaps by USGS, CGS, EERI, SSA. It seems a good way to keep people informed of practical and cost-effective ways in which seismic risk can be reduced.

San Francisco has invested $20 billion to increase its seismic resilience since the 1989 Loma Prieta earthquake - see report (link below) for more information. Thank you to all involved in this effort and the rate payers & taxpayers who funded this vital work. Great job! www.sf.gov/preparing-ou...

onesanfrancisco.org/earthquake-s...

San Francisco has invested $20 billion to increase its seismic resilience since the 1989 Loma Prieta earthquake - see report (link below) for more information. Thank you to all involved in this effort and the rate payers & taxpayers who funded this vital work. Great job! www.sf.gov/preparing-ou...

“Fracture mode influence on surface rupture: The 2019 M 7.1 Ridgecrest earthquake, California, USA” in Geology by Nevitt et al. doi.org/10.1130/G530...

“Fracture mode influence on surface rupture: The 2019 M 7.1 Ridgecrest earthquake, California, USA” in Geology by Nevitt et al. doi.org/10.1130/G530...

Could a future “supershear” rupture happen in California? Most would likely now say, “yes.” Ross Stein, Ph.D. of Temblor (Stanford/USGS) discusses fault rupture in the context of the San Andreas and (possibly) Hayward faults. Video 🎥 by San Francisco Bay Area’s KPIX CBS youtu.be/dhQkNb_Bz5c

Excerpt: “Although their lateral motion has long been recognized, a growing body of global evidence is now highlighting a more hazardous aspect of these systems: supershear earthquakes—fast propagating ruptures that exceed the speed of shear waves and can cause disproportionately intense shaking…”

Could a future “supershear” rupture happen in California? Most would likely now say, “yes.” Ross Stein, Ph.D. of Temblor (Stanford/USGS) discusses fault rupture in the context of the San Andreas and (possibly) Hayward faults. Video 🎥 by San Francisco Bay Area’s KPIX CBS youtu.be/dhQkNb_Bz5c

I’d encourage those who know this better than I do to correct that last comment, especially. I think of the 1940 Imperial Valley records, 1992 Landers Lucerne South, and 2002 Pump Station 10 Denali (M 7.9) - any other suggestive slip pulses? Are there recent open-access review papers? Elbanna et al.

Could a future “supershear” rupture happen in California? Most would likely now say, “yes.” Ross Stein, Ph.D. of Temblor (Stanford/USGS) discusses fault rupture in the context of the San Andreas and (possibly) Hayward faults. Video 🎥 by San Francisco Bay Area’s KPIX CBS youtu.be/dhQkNb_Bz5c

Here’s an open-access article by Dunham & Bhat that explains the physics of “supershear” with diagrams showing the “Mach cone,” etc. - agupubs.onlinelibrary.wiley.com/doi/full/10....

Could a future “supershear” rupture happen in California? Most would likely now say, “yes.” Ross Stein, Ph.D. of Temblor (Stanford/USGS) discusses fault rupture in the context of the San Andreas and (possibly) Hayward faults. Video 🎥 by San Francisco Bay Area’s KPIX CBS youtu.be/dhQkNb_Bz5c

Thanks to @temblorinc.bsky.social and to the reporter, whose name is Brian Hackney (CBS TV KPIX) and Prof. Ares Rosakis of Caltech as well, whose important early work is featured - rosakis.caltech.edu

“How Venezuela’s Public Housing Towers Were Built to Fail” by Julie Turkewitz and investigative team - gift link to NYT article: www.nytimes.com/interactive/...

The Colorado River was quantitatively compared to The Nile, as follows, in “Colorado River and its utilization” (WSP 395; USGS, 1916) by Eugene Clyde La Rue and Nathan C. Grover - pubs.usgs.gov/publication/... [https://doi.org/10.3133/wsp395]

Gorgeous map by USGS (1916 report): pubs.usgs.gov/wsp/0395/pla...

The Colorado River was quantitatively compared to The Nile, as follows, in “Colorado River and its utilization” (WSP 395; USGS, 1916) by Eugene Clyde La Rue and Nathan C. Grover - pubs.usgs.gov/publication/... [https://doi.org/10.3133/wsp395]

Excerpt: “As the Colorado is often called the Nile of America, a brief comparison of these two river systems is interesting. Like the Colorado, the Nile carries an enormous quantity of silt. By the deposition of silt each river has built up a delta cone at its mouth.”

“Was that Yellowstone earthquake volcanic or tectonic?” 🌋 see this latest article from Caldera Chronicles series by USGS - www.usgs.gov/observatorie...

“Mother Nature doesn’t always conform to simple categories. Long-term investments in seismic monitoring and research have shown us that earthquakes at Yellowstone are often generated by complex (but fascinating!) combinations of tectonic and volcanic processes…” (continued)

“Was that Yellowstone earthquake volcanic or tectonic?” 🌋 see this latest article from Caldera Chronicles series by USGS - www.usgs.gov/observatorie...

“Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from David Shelly, seismologist with the U.S. Geological Survey.”

“Was that Yellowstone earthquake volcanic or tectonic?” 🌋 see this latest article from Caldera Chronicles series by USGS - www.usgs.gov/observatorie...