An improved glimpse into earthquake activity in northeastern Alaska
The northeastern Brooks Range is long known to be seismically active, but meaningful analysis of the earthquake activity has been limited by the lack of instrumentation. The seismic record in the area dates back to the mid-1970s, and shows a broad northeast-trending zone of earthquake activity. Impr...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/9607 2023-05-15T15:46:59+02:00 An improved glimpse into earthquake activity in northeastern Alaska Buurman, Helena 2018-09-04 http://hdl.handle.net/11122/9607 unknown http://hdl.handle.net/11122/9607 Earthquake northeast Alaska Seismic activity Fault Seismic monitoring Article 2018 ftunivalaska 2023-02-23T21:37:19Z The northeastern Brooks Range is long known to be seismically active, but meaningful analysis of the earthquake activity has been limited by the lack of instrumentation. The seismic record in the area dates back to the mid-1970s, and shows a broad northeast-trending zone of earthquake activity. Improvements made in the past 20 years to the permanent seismic network along with new data collected by the temporary USArray network of seismometers located throughout northeastern Alaska have dramatically lowered the earthquake detection threshold in the area. It is now possible to identify patterns within the earthquake data including spatial distribution and occurrence rates, which indicate the presence of previously unrecognized active fault systems. I highlight several such features within the data: a 110 km (60 mi) line of recurring earthquakes near the village of Beaver that strongly suggest a singular fault system; a cluster of earthquakes near the village of Venetie that are likely occurring on a complex active fault system; a years-long mainshock-aftershock sequence of earthquakes near the Draanjik River that began in 2006; and two swarms separated by 50 km (30 mi) in distance and 7 years near the Hulahula River. Yes Article in Journal/Newspaper Brooks Range Alaska University of Alaska: ScholarWorks@UA |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
unknown |
topic |
Earthquake northeast Alaska Seismic activity Fault Seismic monitoring |
spellingShingle |
Earthquake northeast Alaska Seismic activity Fault Seismic monitoring Buurman, Helena An improved glimpse into earthquake activity in northeastern Alaska |
topic_facet |
Earthquake northeast Alaska Seismic activity Fault Seismic monitoring |
description |
The northeastern Brooks Range is long known to be seismically active, but meaningful analysis of the earthquake activity has been limited by the lack of instrumentation. The seismic record in the area dates back to the mid-1970s, and shows a broad northeast-trending zone of earthquake activity. Improvements made in the past 20 years to the permanent seismic network along with new data collected by the temporary USArray network of seismometers located throughout northeastern Alaska have dramatically lowered the earthquake detection threshold in the area. It is now possible to identify patterns within the earthquake data including spatial distribution and occurrence rates, which indicate the presence of previously unrecognized active fault systems. I highlight several such features within the data: a 110 km (60 mi) line of recurring earthquakes near the village of Beaver that strongly suggest a singular fault system; a cluster of earthquakes near the village of Venetie that are likely occurring on a complex active fault system; a years-long mainshock-aftershock sequence of earthquakes near the Draanjik River that began in 2006; and two swarms separated by 50 km (30 mi) in distance and 7 years near the Hulahula River. Yes |
format |
Article in Journal/Newspaper |
author |
Buurman, Helena |
author_facet |
Buurman, Helena |
author_sort |
Buurman, Helena |
title |
An improved glimpse into earthquake activity in northeastern Alaska |
title_short |
An improved glimpse into earthquake activity in northeastern Alaska |
title_full |
An improved glimpse into earthquake activity in northeastern Alaska |
title_fullStr |
An improved glimpse into earthquake activity in northeastern Alaska |
title_full_unstemmed |
An improved glimpse into earthquake activity in northeastern Alaska |
title_sort |
improved glimpse into earthquake activity in northeastern alaska |
publishDate |
2018 |
url |
http://hdl.handle.net/11122/9607 |
genre |
Brooks Range Alaska |
genre_facet |
Brooks Range Alaska |
op_relation |
http://hdl.handle.net/11122/9607 |
_version_ |
1766381792717176832 |