COMET Women's Webinar: Miss Cindy Lim, Dr Lin Shen, Dr Samathan Engwell, 08 March 2023, 4PM UK time
Qi Ou
Dear Colleagues,
COMET (The Centre for Observation and Modelling of Earthquakes, Volcanoes, and Tectonics) invites you to our special women’s webinar on the International Women’s Day, celebrating the brilliant work by women scientists. This webinar will feature 3 women scientists at different career stages working on different aspects of COMET’s scientific interests. They also come from different UK institutions and are originally from different countries. We appreciate your help forwarding this information to a broader audience.
COMET Women’s Webinar
Wednesday 8th March 2023 at 4pm UK time (4pm UTC / 5pm CEST / 8am PDT)
Miss Cindy Lim Shin Yee
PhD Candidate @ University of Bristol, UK
Dr Lin Shen
PostDoc Researcher @ University of Leeds, UK
Dr Samantha Engwell
Senior Scientist @ British Geological Survey, UK
Please register at: https://universityofleeds.zoom.us/webinar/register/WN_Vw6GHtSBRD2myQjAzprpDQ
(After registering, you will receive a confirmation email containing information on how to join the webinar)
Abstract:
Searching for induced small earthquakes using deep learning: Cindy Lim Shin Yee
Geo-energy projects (e.g., shale gas, geothermal) can potentially induce seismicity. These projects require microseismic monitoring as induced seismicity pose serious risks to communities and infrastructure. Deep learning (DL) phase pickers are an efficient solution to process large seismic datasets typically produced during monitoring. We compare existing DL models pre-trained on large datasets containing regional earthquakes and investigated if they can detect small earthquakes in borehole data. The models could detect small earthquakes (with varying success) and additional events that were previously uncatalogued. Enhanced DL catalogues could reveal new insights into the mechanisms controlling induced seismicity during fluid injections.
Large-scale interseismic strain accumulation along the Altyn Tagh Fault determined from InSAR: Lin Shen
The 1600 km-long Altyn Tagh Fault (ATF) is a major intra-continental strike-slip fault along the Northern Tibetan Plateau, the slip rate of which has significant implications for our understanding of the present-day tectonic processes of the Tibetan Plateau region. We present an interseismic velocity field along 1500 km length of the fault derived from Sentinel-1 interferograms. We find that the strain does not concentrate on the whole main strand of the ATF, instead distributed over three discrete broad shear zones (> 100 km). We find that the strain accumulation transfers to the structurally linked Longmu-Gozha Co Fault in the west through the Ashikule step-over zone along the south-western segment of the ATF, with a high strain rate greater than 0.4 μstrian/yr, implying that there might be a relatively greater earthquake potential compared to other portions. This finding suggests that the generation of the NS-trending normal faulting events in this region, such as the 2008 Mw 7.2 Yutian earthquake, is ascribed to the EW-trending extensional stress at the step-over between the two left-lateral faults.
Reaching new heights: the evolution of volcanic plume information: Samantha Engwell
Volcanic plume height is perhaps the most important pieces of information when simulating dispersal of volcanic emissions. Despite this significance, plume height data are often ambiguous. The term plume height can have multiple different meanings, such as plume top or spreading height, and can be determined through numerous methods, from direct observation to interpretation of satellite imagery, to deposit analysis, each with their own implicit uncertainties. Here, issues around reporting plume height and the impact of unclear estimates are presented, alongside thoughts for making plume height data more consistent to enable better hazard analysis for volcanic emissions in the future.
Catch up on past COMET and COMET+ webinars on our YouTube page: https:/www.youtube.com/channel/UCtFDytX1hgjvlS4NH48M2oQ/video
Best wishes,
Scott Watson & Qi Ou
COMET - Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics