Friends in Need When Nature Hiccups, Natural Disasters forum |
Friends in Need When Nature Hiccups, Natural Disasters forum |
Jul 29 2008, 11:23 PM
Post
#201
|
|
Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Sincerely hope all you UMSFers on the West Coast are OK! Read Emily's blog....
http://www.planetary.org/blog/article/00001576/ Widfires and now an earthquake... scary... Concern from an Ohioan who only worries about getting snowed in once or twice a winter season. Craig p.s. With global climate change this forum may get a few posts or two in this century! |
|
|
Mar 19 2011, 08:27 PM
Post
#202
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Pandaneko, I'm glad to hear from you that you were far from the devastated areas. Thank you for your account, and best wishes for your country's rapid recovery.
This one was totally different. It was not a very violent tremor, perhaps it was, but I did not feel ferociously violent elements in it. Instead, the ground rolled a great deal, not up and down, but sideways, and lasting for 5 mininutes. It seemed not ending at all. This is my experience of large but distant earthquakes too, though yours lasted far longer than any I've experienced. Last year there was a biggish quake in northern Mexico, Mag 7.2 about 400 km away from Los Angeles. At my house it felt like a few rolling ocean waves passing by -- slooow up, sloooow down, up and down a couple of times, each "roller" lasting several seconds. I think you are right about the high-frequency waves damping quickly, while the low-frequency ones travel farther; also, the high-frequency waves will be "noisy" and tend to cancel each other while the low-frequency ones will be more coherent. Here is an animation made from GPS station data where you can see the up and down motion of the waves radiating out from the earthquake source. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Lo-Fi Version | Time is now: 6th June 2024 - 02:44 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |