Visualization of the seismic waves and permanent                   displacements         Ronni Grapenthin1 The ARIA Team2 ...
Tectonic Setting                                                                Pacific plate moves                        ...
BackgroundFor some background on plate mechanics, watch the following videomade available through the Education and Outrea...
Permanent deformation measured by GPS            130                    135                   140                    145  ...
The displacement field at 5:50 UTC is the sum of . . .                                                        logo-gi      ...
. . . permanent displacement . . .                                     logo-gi                                      7 / 10
. . . and seismic waves (watch for those in the video)                                                         logo-gi    ...
Preliminary observations from the animation   the actual slip of the Mw =9.0 earthquake is captured in frames   05:47:30-0...
Visualization of the seismic waves and permanent displacements
Visualization of the seismic waves and permanent displacements
Upcoming SlideShare
Loading in...5
×

Visualization of the seismic waves and permanent displacements

5,219

Published on

Published in: Education, Technology
2 Comments
5 Likes
Statistics
Notes
No Downloads
Views
Total Views
5,219
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
125
Comments
2
Likes
5
Embeds 0
No embeds

No notes for slide

Visualization of the seismic waves and permanent displacements

  1. 1. Visualization of the seismic waves and permanent displacements Ronni Grapenthin1 The ARIA Team2 Jeffrey Freymueller1 1 Geophysical Institute, Univ. of Alaska Fairbanks 2 SusanOwen, Jet Propulsion Laboratory Angelyn Moore, Jet Propulsion Laboratory Frank Webb, Jet Propulsion Laboratory Mark Simons, Caltech March 28, 2011 logo-gi 1 / 10
  2. 2. Tectonic Setting Pacific plate moves westward and collides with Japan (Okhotsk Plate), subducts underneath this plate interaction drives earthquakes offshore Japan logo-gi Figure: USGS, http://earthquake.usgs.gov/earthquakes/world/japan/031111_M9.0prelim_geodetic_slip.php 2 / 10
  3. 3. BackgroundFor some background on plate mechanics, watch the following videomade available through the Education and Outreach Program ofIRIS (www.iris.edu/educate). logo-gi 3 / 10
  4. 4. Japan GEONET: Dense continuous GPS array started in 1993 by Geospatial Information Authority (GSI) of Japan with about 210 sites) 1995 Kobe earthquake tragedy resulted in intensified earthquake research see Sagiya (2004) for more details today: more than 1200 continuous GPS stations logo-gi 4 / 10
  5. 5. Permanent deformation measured by GPS 130 135 140 145 ARIA Preliminary Post and Coseismic 45 Displacements from Mw9.0 Sendai-Oki Earthquake 45 40 40 arrows show permanent horizontal displacements red: Mw 9.0 event at 05:46:23 UTC 35 35 blue: mainly Mw 7.9 event near Tokyo at 1m 06:26:12 UTC 1m 30 30 Figure shows horizontal displacements based on ARIA verion 0.3 position estimates for GEONET stations. Coseismic displacement is shown in red, and first 8 hours of postseismic motion is shown in blue, including motion caused by aftershocks. Bars at end of vector show logo-gi 95% error estimate. Solutions courtesy of ARIA team at JPL and Caltech (email aria@jpl.nasa.gov or aria@caltech.edu). All original GEONET RINEX data provided to Caltech by the Geospatial Information Authority (GSI) of Japan. 5 / 10
  6. 6. The displacement field at 5:50 UTC is the sum of . . . logo-gi 6 / 10
  7. 7. . . . permanent displacement . . . logo-gi 7 / 10
  8. 8. . . . and seismic waves (watch for those in the video) logo-gi 8 / 10
  9. 9. Preliminary observations from the animation the actual slip of the Mw =9.0 earthquake is captured in frames 05:47:30-05:49:00 body waves (S-wave), causing small displacements, traverse the array at about 8 km/s (this is apparent velocity, not S-wave velocity) surface wave, causing large displacements, travels at about 5 km/s logo-gi 9 / 10
  10. 10. Links Preliminary Geodetic Slip Model of the 2011 M9.0 Tohoku-chiho Taiheiyo-oki Earthquake (USGS): http://earthquake.usgs.gov/earthquakes/world/japan/031111_M9.0prelim_geodetic_slip.php Geohazards Supersite website – preliminary results: http://supersites.earthobservations.org/sendai.php Seismic wave propagation recorded on dense strong-motion seismograph networks in Japan (K-NET/KiK-net): http://outreach.eri.u-tokyo.ac.jp/eqvolc/201103_tohoku/eng/#knet R. Grapenthin, Kinematic GPS solutions: http://gps.alaska.edu/ronni/sendai2011.html logo-gi 10 / 10

×