March 23, 2013
This is the inaugural post of a weekly series I promised to start that will supplement my more in depth but sporadic blogging about topical seismic events. A couple months ago I joined Twitter to broadcast some of the interesting seismic news snippets I come across daily, including lots of content that didn’t really warrant drawn out posts. As I promised then, I’m now compiling my full week of Tweeted links into a “weekend reading” sort of post, to let you catch up on all the earthquake news you missed as it flew by on Twitter. So here goes: a bunch of articles about earthquakes to read, and why to read them.
Earthquake Early Warning
The biggest U.S. quake news was the tremor that rattled L.A. a couple weeks ago and spawned renewed lamentations about the stagnant state of California’s earthquake early warning system. The New York Times had the most comprehensive story:
…but some local media outlets had their own lamentations to add:
To me the highlight of the New York Times piece was the imaginative explanation of what benefits early warning of an earthquake could provide:
“[Japan’s EEW system was able to] activate computerized programs to slow commuter trains so they did not go off their tracks, stop elevators so passengers were not stranded between floors, flash highway warning signs instructing motorists to slow down and avoid overpasses, and open doors at fire stations so they would not be stuck shut should power be lost.
The warning would go out to home computers and personal cellphones, giving surgeons a moment to withdraw scalpels, workers at Disneyland time to shut down Space Mountain, home cooks an opportunity to turn off the gas and everyone a moment to… dive under a desk.
If you are cooking, you can step away from the boiling water… it would help people psychologically, decreasing the surprise that can freeze people in confusion and fear when the ground starts moving, or lead to panicked and dangerous reactions, like running outside a building.”
I like the introduction of the intangible psychological benefits of reducing the paralyzing suddenness with which earthquakes set upon us.
A bunch of articles have just come out regarding earthquake survival kits.
Oregon Live asks where to put them (the answer is “everywhere… and make sure they’re accessible”).
The USA Today introduces us to some particularly dedicated preppers:
And the New Zealand Herald describes an effect I think most seismologists would be ecstatic to learn of: small tremors have a huge impact on emergency kit sales (up 300%), signaling that people really do treat the benign moderate jolts as reminders of real hazard.
Prediction vs. Mitigation
On a subject intimately related to the prior two, The Guardian published an article by Dave Petley, director of the Institute of Hazard, Risk, and Resilience at the University of Durham (and perhaps known more familiarly as the author of AGU’s Landslide Blog). Dave presents the elusive ideal of earthquake prediction through a simple and plainspoken set of thought exercises, which ultimately illustrate that prediction isn’t truly what we want. Mitigation, preparation, and a few moments warning should suffice… and may have to.
On the 2nd anniversary of the March 11, 2011 M9.0 Tohoku earthquake, the National Oceanic and Atmospheric Administration reminded us that twenty eight other tsunamis have struck various parts of the world since then.
Earthquakes Rock the Atmosphere
A widely circulated research result this past week was the discovery of significant signals from the Tohoku earthquake… recorded by satellite gravity measurements as pressure waves passed through the edge of the atmosphere. There’s a great animation of the data here:
That should do it for now. Tune in again next weekend, or Follow me on Twitter! @TTremblingEarth