tag:blogger.com,1999:blog-30940686.post7505132959258383129..comments2024-02-11T22:49:17.311-08:00Comments on Arizona Geology: Black Canyon City Earthquake SequenceLee Allisonhttp://www.blogger.com/profile/11520300956249160005noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-30940686.post-69298955316400925352016-04-09T04:13:51.133-07:002016-04-09T04:13:51.133-07:00Hi. I live in Black Canyon City and of course felt...Hi. I live in Black Canyon City and of course felt two of the earthquakes in this cluster. I did not feel the lesser 3.2 earthquake but felt the other two. I also felt one a few years before this that was 2.8. I knew right away that it was an earthquake.. the second after shock that was 4.0 that I felt seemed to me that it had a higher wave than the later 4.0 earthquake. I am also curious if any studying has been done since this earthquake cluster. Any damage to the rock slides? It seems to me they look like they collapsed more. I need to go hiking up there, but I havent had the time. During coverage of this earthquake I got quite annoyed by all the attention it got from the Phoenix area, and yet here I lived much closer to the quakes.. The energy must have been focused on a hard rock or something to be transmitted so far away.. down into the Phoenix area. Anyways, It was a fun experience. After the second one i felt I wondered if a bigger one was coming or not.. took me quite a few hours ot fall asleep that night :)<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-30940686.post-16620760088096726842015-12-31T15:32:51.115-08:002015-12-31T15:32:51.115-08:00What about Aug 23,2011? Not natural?What about Aug 23,2011? Not natural?Anonymoushttps://www.blogger.com/profile/06848083613984874081noreply@blogger.comtag:blogger.com,1999:blog-30940686.post-56549923302961356372015-11-02T20:06:04.924-08:002015-11-02T20:06:04.924-08:00The relative energies of the main quake and the af...The relative energies of the main quake and the aftershock, judged by integrating the amplitude vs time for each event, as well as the huge "Did you feel it?" difference in responses for each on USGS's website, seem to suggest that the difference in MMI between the two was greater than 0.1. Am I wrong, that these two quakes had to have been more than 0.1 magnitude different?<br /><br />Here's my own plot from a vertical sensor in my Tempe garage, paired with U of A's BHZ sensor on the second trace: https://www.dropbox.com/s/ed0n7mkau99zln5/PhoenixQuakes110115.tiff?dl=0<br /><br />And here's my seismo (sub-hobby) website: http://general.fastq.com/~stefano/pages/seismic.html<br /><br />Feeling this quake gave me a new respect for the instability of the inverted pendulum formed by the concrete tiles on my roof. I saw first hand the danger of that kind of structure in L'Aquila, Italy after their 2009 quake.azstefanohttps://www.blogger.com/profile/08422510031169385826noreply@blogger.comtag:blogger.com,1999:blog-30940686.post-25506151989211798772015-11-02T16:17:59.853-08:002015-11-02T16:17:59.853-08:00I felt nothing. I live in Cordes Lakes (Junction)...I felt nothing. I live in Cordes Lakes (Junction).Anonymoushttps://www.blogger.com/profile/10478517335183167366noreply@blogger.com