toolbox
====== Differences ====== This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
mika:proposal [2014/10/30 18:28] usherm42 |
mika:proposal [2014/10/30 18:34] (current) usherm42 |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ** Monitoring Ground Deformation from the Wooded Island Earthquake Swarm near Hanford, Washington** | + | ====Monitoring Ground Deformation from the Wooded Island Earthquake Swarm near Hanford, Washington==== |
| - | **Introduction and Background** | + | ===Introduction and Background=== |
| An earthquake swarm began early 2009 at Wooded Island on the Columbia River, located on the southeast border of the Hanford | An earthquake swarm began early 2009 at Wooded Island on the Columbia River, located on the southeast border of the Hanford | ||
| Line 14: | Line 14: | ||
| and a near-horizontal fault about 0.5 km below the surface. | and a near-horizontal fault about 0.5 km below the surface. | ||
| - | **Proposed Work** | + | ===Proposed Work=== |
| Clustered shallow earthquakes continue to occur at Wooded Island. Since October of 2009, 294 earthquakes have contributed | Clustered shallow earthquakes continue to occur at Wooded Island. Since October of 2009, 294 earthquakes have contributed | ||
| Line 21: | Line 21: | ||
| the swarm site to measure the ground deformation that has taken place since the end of Wicks’ study and to look for | the swarm site to measure the ground deformation that has taken place since the end of Wicks’ study and to look for | ||
| migration of the deformation toward areas of concern such as the Hanford nuclear site. | migration of the deformation toward areas of concern such as the Hanford nuclear site. | ||
| + | |||
| + | ===Data=== | ||
| + | |||
| + | I will create interferograms from SAR scenes collected by ENVISAT (ENVI) and the European Remote Sensing satellite(ERS-2). | ||
| + | ENVI scenes were collected along track 70 between January and July 2010. ERS-2 scenes along track 70 collected were in January | ||
| + | and February of 2011. Additional ENVI scenes, collected along track 27 between June and December 2011, will be used to observe | ||
| + | the deformation from the highest magnitude earthquakes in the swarm (M3.3 - M3.7). My intention is to produce a minimum of four | ||
| + | interferograms spanning from January to June 2010, July 2010 to February 2011, January 2010 to February 2011, and June 2011 to | ||
| + | December 2011. There was a limited amount of SAR data available for this site. Scenes along track 70 were only available | ||
| + | through February 2011 so I will be unable to create an interferogram that spans all of 2010 and 2011. | ||
| + | |||
| + | ===Project Significance=== | ||
| + | |||
| + | Earthquake swarms at Wooded Island are cause for concern because they are shallow. Moderate magnitude, shallow | ||
| + | earthquakes have the potential to cause damage because the hypocenters are located close to the surface (Wicks et al., 2013) | ||
| + | where moderate shaking can easily be felt. Ground motion and deformation caused by the Wooded Island swarm should continue to | ||
| + | be monitored because of its close proximity to the Hanford nuclear site. Continued deformation could increase the risk of | ||
| + | radioactive contamination by compromising barriers containing toxic waste and allowing it leak into the groundwater. | ||
