{"id":{"repo_id":"central-wash","oai_identifier":"oai:digitalcommons.cwu.edu:etd-1716"},"canonical_url":"https://search.dev.ndltd.org/etd/central-wash/oai:digitalcommons.cwu.edu:etd-1716","repository":{"repo_id":"central-wash","name":"Central Washington University","base_url":"https://digitalcommons.cwu.edu/do/oai/"},"display":{"title":"Tidal and Structural Controls on Seismic Events Near the Grounding Line at Beardmore Glacier, Antarctica","abstract":"Here I report seismic events occurring over a three-week period during the 2013-2014 austral summer near the grounding line of Beardmore Glacier, Antarctica. The ~24000 events over this time frame had a noticeable temporal pattern that correlates well with the principally diurnal tides of Antarctica. Falling and rising tide each accounted for nearly equal occurrence of events, and most (~42%) events occurred in the last third of any tidal cycle. Event epicenters were located using beamforming, and display a spatial pattern of two distinct clusters. Appearance of event location clusters differ on rising and falling tide. I theorize that, due to direction of glacier outlet and direction of overall ice shelf flow, the Beardmore Glacier can be separated into two zones near its grounding line that explain this pattern. There is an extensional zone which experiences most stress during falling tide, and a compressional zone that undergoes stress during both falling and rising tide.","abstract_html":"Here I report seismic events occurring over a three-week period during the 2013-2014 austral summer near the grounding line of Beardmore Glacier, Antarctica. The ~24000 events over this time frame had a noticeable temporal pattern that correlates well with the principally diurnal tides of Antarctica. Falling and rising tide each accounted for nearly equal occurrence of events, and most (~42%) events occurred in the last third of any tidal cycle. Event epicenters were located using beamforming, and display a spatial pattern of two distinct clusters. Appearance of event location clusters differ on rising and falling tide. I theorize that, due to direction of glacier outlet and direction of overall ice shelf flow, the Beardmore Glacier can be separated into two zones near its grounding line that explain this pattern. There is an extensional zone which experiences most stress during falling tide, and a compressional zone that undergoes stress during both falling and rising tide.","abstract_has_math":false,"creators":["Cooley, Jade"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":null,"degree_discipline":"Geological Sciences","degree_department":null,"school":null,"contributors":["Paul Winberry","Audrey Huerta","Michelle Koutnik"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-01-01T08:00:00Z","date_published":"2017-01-01T08:00:00Z","updated_at":"2026-07-24T01:37:04Z","subjects":["cryoseismology","Ross Ice Shelf","icequakes","buttressing","GPS","Geophysics and Seismology","Glaciology"],"languages":["English"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.cwu.edu/etd/700","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Paul Winberry","Audrey Huerta","Michelle Koutnik"]},{"key":"dc:creator","label":"Author","values":["Cooley, Jade"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2018-08-08T07:00:00Z"]},{"key":"dc:type","label":"Dc Type","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geological Sciences"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["cryoseismology","Ross Ice Shelf","icequakes","buttressing","GPS","Geophysics and Seismology","Glaciology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://digitalcommons.cwu.edu/etd/700"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Here I report seismic events occurring over a three-week period during the 2013-2014 austral summer near the grounding line of Beardmore Glacier, Antarctica. The ~24000 events over this time frame had a noticeable temporal pattern that correlates well with the principally diurnal tides of Antarctica. Falling and rising tide each accounted for nearly equal occurrence of events, and most (~42%) events occurred in the last third of any tidal cycle. Event epicenters were located using beamforming, and display a spatial pattern of two distinct clusters. Appearance of event location clusters differ on rising and falling tide. I theorize that, due to direction of glacier outlet and direction of overall ice shelf flow, the Beardmore Glacier can be separated into two zones near its grounding line that explain this pattern. There is an extensional zone which experiences most stress during falling tide, and a compressional zone that undergoes stress during both falling and rising tide."]},{"key":"dc:title","label":"Title","values":["Tidal and Structural Controls on Seismic Events Near the Grounding Line at Beardmore Glacier, Antarctica"]}]}],"canonical_facts":{"dc:contributor":["Paul Winberry","Audrey Huerta","Michelle Koutnik"],"dc:creator":["Cooley, Jade"],"dc:date.available":["2018-08-08T07:00:00Z"],"dc:description.abstract":["Here I report seismic events occurring over a three-week period during the 2013-2014 austral summer near the grounding line of Beardmore Glacier, Antarctica. The ~24000 events over this time frame had a noticeable temporal pattern that correlates well with the principally diurnal tides of Antarctica. Falling and rising tide each accounted for nearly equal occurrence of events, and most (~42%) events occurred in the last third of any tidal cycle. Event epicenters were located using beamforming, and display a spatial pattern of two distinct clusters. Appearance of event location clusters differ on rising and falling tide. I theorize that, due to direction of glacier outlet and direction of overall ice shelf flow, the Beardmore Glacier can be separated into two zones near its grounding line that explain this pattern. There is an extensional zone which experiences most stress during falling tide, and a compressional zone that undergoes stress during both falling and rising tide."],"dc:identifier":["https://digitalcommons.cwu.edu/etd/700"],"dc:language":["English"],"dc:subject":["cryoseismology","Ross Ice Shelf","icequakes","buttressing","GPS","Geophysics and Seismology","Glaciology"],"dc:title":["Tidal and Structural Controls on Seismic Events Near the Grounding Line at Beardmore Glacier, Antarctica"],"dc:type":["Text"],"thesis:degree_discipline":["Geological Sciences"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T01:37:04Z"}