A5042639879- Landslides and related hazards
- Cryospheric studies and observations
- Seismic Waves and Analysis
- Winter Sports Injuries and Performance
- Arctic and Antarctic ice dynamics
Scripps Institution of Oceanography
2017-2019
University of California, San Diego
2017-2019
Abstract Understanding deformation in ice shelves is necessary to evaluate the response of thinning. We study microseismicity associated with shelf using nine broadband seismographs deployed near a rift on Ross Ice Shelf. From December 2014 November 2016, we detect 5,948 icequakes generated by deformation. Locations were determined for 2,515 events least squares grid‐search and double‐difference algorithms. Ocean swell, infragravity waves, significant tsunami arrival do not affect...
Abstract Gravity waves impacting ice shelves illicit a suite of responses that can affect shelf integrity. Broadband seismometers deployed on the Ross Ice Shelf, complemented by near‐icefront seafloor hydrophone, establish association strong icequake activity with ocean gravity wave amplitudes ( A G ) below 0.04 Hz. The Shelf‐front seismic vertical displacement S V are well correlated , allowing estimating frequency‐dependent transfer function from amplitude to icefront T f )). is 0.6–0.7 at...
Abstract The responses of the Ross Ice Shelf (RIS) to 16 September 2015 8.3 ( M w ) Chilean earthquake tsunami (>75 s period) and oceanic infragravity (IG) waves (50–300 were recorded by a broadband seismic array deployed on RIS from November 2014 2016. Here we show that IG‐generated signals within propagate at gravity wave speeds (∼70 m/s) as water‐ice coupled flexural‐gravity waves. IG band measureable attenuation away shelf front. response arrivals is compared with modeled forcing...