Typhoon Tip Posted October 17, 2012 Share Posted October 17, 2012 I've heard that Cape Ann off shore 1755 temblor was 6.0 from one source and 6.3 from another. It's important, because the MM (moment magnitude) scale (used to be the R-scale until it was determined by geophysicists to be slightly inaccurate) is logarithmic. .1 or 1 ...can't recall which, is 32 times stronger; such that 6.3 is a hell of a lot more powerful than a 6.0. Reanalysis is only so useful in this case given the highly antiquated time and having so little structural components combined with veracious surviving accounts from which to draw valid conclusions. For all we know, it was even higher than a 6.3. ..or lower Frankly, I have always had a problem with calling a fault inactive if it can jolt the crust for mid 6'er. It may simply have an excessively long periodicity between events but whatever the standardization is they use to judge whether a fault is dormant or not would mean garbage to the people at the top of the Prudential in Boston should 6.5 hit a mere 10 or 20 miles off shore of Cape Ann again. And of course, btw, nothing in the infrastructure and edifices of Boston is really built for that sort of ordeal - to put it real lightly. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted October 17, 2012 Share Posted October 17, 2012 Back Bay of Boston is all fill anyway Liquifaction is a messy thing Link to comment Share on other sites More sharing options...
Clinch Leatherwood Posted October 17, 2012 Share Posted October 17, 2012 If that's what a 4.0 (adjusted) does...yikes. From relatives near the epicenter in Hollis...broken dishes, plates, other stuff, lots of noise, no structural damage. Link to comment Share on other sites More sharing options...
MJHUB Posted October 17, 2012 Share Posted October 17, 2012 was in my basement, shook the couch 2-3 times. Felt like I was still living in California Link to comment Share on other sites More sharing options...
weatherMA Posted October 17, 2012 Share Posted October 17, 2012 Felt in for 15 seconds or so here in Plymouth. Was inside listening to a lecture but heard a small noise and brief shaking. A lot of people in the lecture heard nothing, and the lecture just kept on going...pretty cool though, first earthquake I've felt. Link to comment Share on other sites More sharing options...
weatherwiz Posted October 17, 2012 Share Posted October 17, 2012 If that's what a 4.0 (adjusted) does...yikes. From relatives near the epicenter in Hollis...broken dishes, plates, other stuff, lots of noise, no structural damage. Had the quake occurred much deeper below the surface any damage would have been greatly reduced. Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted October 17, 2012 Share Posted October 17, 2012 Didn't feel a thing....I even find the subsidence-FU-slot in earthquakes. Link to comment Share on other sites More sharing options...
andyhb Posted October 17, 2012 Share Posted October 17, 2012 Didn't feel a thing....I even find the subsidence-FU-slot in earthquakes. Link to comment Share on other sites More sharing options...
ineedsnow Posted October 17, 2012 Share Posted October 17, 2012 you didnt get thundersnow in october? I had thundersnow once when I was a 14 in Michigan associated with LE. I moved to Massachusetts 4,003,123,445 years ago and seem to get thundersnow every winter at least once. ...except last year of course. Link to comment Share on other sites More sharing options...
tamarack Posted October 17, 2012 Share Posted October 17, 2012 Felt nothing, and our Lab and cats didn't react - critters usually sense these things. However, friends in Farmington reported some shaking. Link to comment Share on other sites More sharing options...
All Wet Posted October 17, 2012 Share Posted October 17, 2012 I got a pretty good shaking (I'd actually describe more as a "vibration") and deep rumbling in Westbrook ME. It seemed to last about 20 seconds from start to finish. I was one of the thousands who first thought the furnace was blowing up. Lots of nervous neighbors in the street, but no damage in my vicinity. Link to comment Share on other sites More sharing options...
wackymann Posted October 17, 2012 Share Posted October 17, 2012 I was dozing on the couch and the earthquake actually woke me up. The whole couch was shaking, and the knick knacks on our window sill were rattling. It was weird. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.