It’s hard to believe, until you see proof.
And here it is.
You’re looking at the electronic seismograph for Mt. Hood. See where the lines get absolutely crazy about halfway down? That’s the energy from Japan’s 8.9 “Great quake” vibrating underneath Oregon’s most famous peak.
The really dense section is the actual subduction zone quake, which lasted an estimated 2-3 minutes. That’s non-stop shaking we’re talking about.
The smaller but still visible ‘scribbles’ on the bottom third are some of the major aftershocks being detected under Mt. Hood.Â
4 Facts About The March 2011 Japanese QuakeÂ
- it was the strongest quake ever recorded in Japan
- it ties for the fifth strongest earthquake in world history. at least back to 1890, when we first started measuring the quakes
- it’s similar in strength to a subduction zone quake that happened off the Oregon Coast in 1700. That quake is believed to have been about a 9.0
- the Univeristy of Washington’s Webicorder network detected the Japan quake’s energy under other peaks, too: Mt. Rainier, Mount St. Helens and even Crater Lake
Bruce…Good Stuff!!!!!!!!!
Pete and Brenda
While laying in bed reading last night (3-10-11), I felt what I thought was an earthquake. It was just one noticeable bump, but so noticeable that I looked at my watch to note the time so that I could check in the morning for any activity. The time was 10:53 PM. How does that fit in with any reported seismic activity in SW Portland?
I can’t find any quakes in the Portland area last night. So it might’ve been a truck…but you just never know around here! Thanks for the question.
Hi Bruce…. good work!
so much info out there, hard to sort through it all… this link has info about dozens of earthquakes world wide… maybe you already have this but just in case!
http://hisz.rsoe.hu/alertmap/index2.php?smp&lang=eng
my heart is breaking watching all this!
thanks
Darlisa