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Originally posted by DancedWithWolves
Would appreciate help by our EQ watchers in understanding the future risk of this confirmed overshoot on the fault please.
March 11 quake triggered dynamic overshoot of fault
The team, led by Satoshi Ide, an associate professor of seismology at the University of Tokyo's science department, analyzed the process of the rupture for the first 100 seconds by examining seismic waves recorded by seismographs around the world.
"A strong spatial variation of rupture characteristics in the M9.0 Tohoku-Oki megathrust earthquake controlled both the strength of shaking and the size of the tsunami that followed," he said.
"Finite source imaging reveals that the rupture consisted of a small initial phase, deep rupture for up to 40 seconds, extensive shallow rupture at 60 to 70 seconds, and continuing deep rupture lasting over 100 seconds," the Ide team said, according to Science.
"A combination of a shallow dipping fault and a compliant hanging wall may have enabled a large shallow slip near the trench," it said. "Normal faulting aftershocks in the area of a high slip suggest a dynamic overshoot on the fault."
Ide added, "An overshoot had been theoretically speculated, but this is the first time it was confirmed. We have to take that into account as we ponder future policies."
Originally posted by BobAthome
reply to post by muzzy
Santorini Volcano 1500 b.c
Simav (Kutahya),, about to become the new Santorini ?
honest speculation needed, not being irrational,,i dont think,,,,,,,,,,,,,,, opinions needed.
Originally posted by muzzy
reply to post by BobAthome
Another 74 Aftershocks since I posted the map 8 hrs ago
Most of them < Mag 2 but nevertheless thats a heck of a lot of aftershocks for a 5.9ML quake (200)
new map hereedit on 20-5-2011 by muzzy because: (no reason given)
Originally posted by jjjtir
updated 0.3 points - 5.6 > 5.9. Originally 6.5 from automatic NOAA system.