To obtain evidence of bowing of the N American plate in progress, I checked the REV ground motion of stations in the Russian Far East from 2014/01/01 or 2013/08/13 to 2014/10/11.
There are six stations available of the ground motion in REV there; BILL, MA2, PET, TIXI, YAK and YSS.
BILL is on the N American plate, MA2, PET and YSS are on the…Continue
A big ground adjustment at station GTBY, Guantanamo Bay, Cuba, was observed in REV on 2014/10/06. I show its seismogram here.
In addition I checked the stations in REV around GTBY. They are three stations in Jamaica; MBJB, STHB and YHJB, two stations in Haiti, LGNH and PAPH, four stations in Dominican Rep, SDDR, SC01, SDD and PCDR, and one station in…Continue
Added by Kojima on October 8, 2014 at 5:29pm — No Comments
A big ground adjustment at station CN.YKW3, Yellowknife, NT (Northwest Territories of Canada), 62.56 N, 114.61 W, located near the center of the North American Plate has been observed in REV since 2014/09/15,…Continue
At three stations of Rhode Island (RI), New Hampshire (NH) and Maine (MA) in New England, characteristic ground motion in REV
was observed between 21:00 and 22:00 on September 16.…Continue
Added by Kojima on September 17, 2014 at 1:34pm — No Comments
A certain characteristic motion wave, a large wave like a very complex serration continuing rhythmically for a few hours,
was recorded at eight stations in Michigan on May 27, 30, or June 4, 2014.…Continue
Added by Kojima on July 25, 2014 at 7:57am — No Comments
EarthScope ANF Website
gives the latest seismic data from a server of each station in the USArray as a detail of waveforms, plot for Last Month, Last Week, Last Day or Last Hour.
A plot of the seismic waveforms shows three data…Continue
Added by Kojima on July 17, 2014 at 11:24am — No Comments
A station UGM, GEOFON Station Wanagama, Java, Indonesia,
which is located the east of a station COCO showing a ground motion change on June, 2013, …Continue
Added by Kojima on June 26, 2014 at 3:58pm — No Comments
REV gives a seismograph of a ground motion at each station in the world,
and several types of ground motion can be seen.…Continue
Added by Kojima on June 20, 2014 at 2:20am — No Comments
Watching a ground motion in REV,
several types of ground motion wave can be seen.…Continue
Added by Kojima on June 13, 2014 at 4:23pm — No Comments
The seismogram of SMCO, Snowmass, Colorado, USA, in REV
showed a normal ground motion wave before May 18, 2014.…Continue
Added by Kojima on June 9, 2014 at 3:00pm — No Comments
In my previous blog,
I showed some interesting ground motion found in the Rapid Earthquake Viewer (REV),…Continue
Watching heliplots on LISS (Live Internet Seismic Server) site,
we can see jolts occurring at some stations, VNDA, LBTB, LPAZ, PLCA, BOSA, CPUP and DBIC, weekly, …Continue
Added by Kojima on May 11, 2014 at 9:14pm — No Comments
On 2014-03-25, a pattern of jolt appearance in a series at seven stations changed after continuing six times every one week since 2014-02-11. In the 7th series, a jolt appearance changed at two stations of LBTB and PLCA while there was no change at the other five stations.
I found a jolt in a heliplot of GSN Stations on 2014-02-11.
Added by Kojima on March 29, 2014 at 4:39pm — No Comments
Based on worldwide earthquake data of IRIS
showing earthquakes of more than magnitude 4, I classified each earthquake in five areas by its location and made the…Continue
Added by Kojima on March 23, 2014 at 1:18pm — No Comments
Added by Kojima on March 13, 2014 at 5:01pm — No Comments
Monitoring a Jolt in a heliplot, I noticed a wave undulation sometimes appeared at some GSN stations. So I collected a heliplot image where it appeared, and arranged the date and time and the observation station, and plotted them on a map with numbering in chronological order. Here is the data for four days, from 2014-02-25 to 2014-02-28.
I also noticed that…Continue
Added by Kojima on March 2, 2014 at 11:30am — No Comments
At first I'd like to show that a vertical time axis, Hour, in a heliplot can be displayed with slipping off for one hour, which sometimes happens when a heliplot screen is updated, and I have noticed it since the first series.
An example is the following figure.…Continue
As shown in a previous blog of "Jolt in Antarctica, Africa and South America some days after M6 Scotia Sea 2014-02-08", a series of Jolt was recorded at some GSN stations in Antarctica, Africa and South America some days after M6 Scotia Sea 2014-02-08.
A jolt began at 14:10 UTC of…Continue