On March 11, we mark the third anniversary of the huge Sendai earthquake and tsunami in Japan (officially known as the Tohoku quake of 2011, since it struck that region). It was the most powerful earthquake ever to hit Japan, and the fifth most powerful quake ever to occur since modern recordkeeping began in 1900. It started when the oceanic crust about 70 km (43 miles) to the east of Tohoku and 30 km below the surface thrust down into the subduction zone beneath Japan. This plate movement produced a quake with a moment magnitude of 9.0, and it caused the islands of Japan to shift 2.4 m (8 feet) east in a matter of seconds. The upward acceleration on the quake was almost 3 times the force of gravity, so many objects flew up in the air. It released almost twice as much energy as the Sumatran quake on Dec. 26, 2004, which killed a quarter of a million people. The energy released by the quake would have been enough to power Los Angeles for an entire year. The earthquake even shifted the earth’s axis and caused it to wobble as much as 10-25 cm (4-10 inches). It also generated low-frequency sound waves that could be detected by satellites.
The quake shook up my life in many ways. Just weeks before, my new book Catastrophes! had been published, and the publicity folks at Johns Hopkins University Press asked me to be prepared to get a big boost of press events and sales if a natural disaster occurred. Sure enough, a week or two later we heard the news from Japan, and suddenly my phone was ringing off the hook. The next morning, I found myself getting up at 5:00 a.m. to drive over to a studio where I could speak directly to the East Coast audiences on MSNBC twice in a few hours–my first experience as a “talking head expert” on TV. Then I got home and found a call from the Los Angeles Times for a short piece on earthquakes and preparedness, which I wrote in just two hours and was published on the editorial page of the Times the next morning. That same day it appeared, I got a call from Mayor Villaraigosa, who wanted my opinion on earthquake preparedness in Los Angeles, and what we should do besides our annual “California Shake-Out” drills each October. Over the next few months, I found myself doing interview after interview: NPR, BBC, PBS, and numerous other radio and TV outlets. Never in my life have I gotten so much free publicity for promoting a book! (continue reading…)