COMET Webinar: Dr Edna Dualeh, University of Bristol: 01 December 2022, 4PM UK time

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From: Qi Ou <Q.Ou@xxxxxxxxxxx>


Dear Colleagues,

COMET (The Centre for Observation and Modelling of Earthquakes, Volcanoes,
and Tectonics) invites you to the next installment of our COMET webinar
series, viewable from the home office.

*Potential of Synthetic Aperture Radar backscatter for monitoring volcanic
eruptions*
*Thursday 1st December 2022 at 4pm UK time* (4pm UTC / 5pm CEST / 8am PDT)
*Dr Edna Dualeh*
*University of Bristol, UK*

*Please register at: *
*https://urldefense.com/v3/__https://universityofleeds.zoom.us/webinar/register/WN_a_dWqkxxSdKxvMRxje2aMw*__;Kg!!IKRxdwAv5BmarQ!b_dvWNiY2VTUuCJ0tt9K7C7kFLdj-IXt4CbDJYFyCQpcOibWdeWipcel0y1FrcZnurX9BsH5ENdQZ-12$ 
<https://urldefense.com/v3/__https://universityofleeds.zoom.us/webinar/register/WN_a_dWqkxxSdKxvMRxje2aMw__;!!IKRxdwAv5BmarQ!YZ1X0VPFr6KVWRoFi91-CDI-kBjLUDQGw1cIW_451VC0Vxhh71v0H4ELOTYaM6TJOYMoaaqQmfgypA$>
(After registering, you will receive a confirmation email containing
information on how to join the webinar)

*Abstract:*
Synthetic Aperture Radar (SAR) backscatter is useful for observing volcanic
activity, especially for remote or dangerous eruptions, as it is not
limited by access to the volcano or cloud-coverage, but currently it is
less widely used for volcano monitoring than radar phase measurements
(e.g., InSAR). This is in part because of ambiguity in the interpretation
of backscatter signals: there is not always a simple link between the
magnitude or signal of the backscatter and the physical properties of
volcanic deposits.
In this webinar, we present three case studies (Puâ??u â??Å?â??Å? Crater, KÄ«lauea,
Hawaiâ??i, 2010-2013; Volcán de Fuego, Guatemala, 2018; and La Soufrière, St.
Vincent, 2021) using a range of SAR sensors to demonstrate how radar
backscatter can be used to research and monitor a variety of volcanic
eruptions, and to extract quantitative information. We examine the use of
various methods to reduce (1) noise (e.g., speckle filters and extended
timeseries), (2) satellite geometry (e.g., radiometric terrain correction),
and (3) constellation influences (e.g., principal component analysis)
present in backscatter signals and to improve the identification of
volcanic changes. Through our work we wanted to show that SAR backscatter
can be a powerful tool for volcano monitoring.

Catch up on past COMET and COMET+ webinars on our YouTube page:
https://urldefense.com/v3/__https://www.youtube.com/channel/UCtFDytX1hgjvlS4NH48M2oQ/video__;!!IKRxdwAv5BmarQ!b_dvWNiY2VTUuCJ0tt9K7C7kFLdj-IXt4CbDJYFyCQpcOibWdeWipcel0y1FrcZnurX9BsH5ECCAkZ8T$ 
<https://urldefense.com/v3/__https://eur03.safelinks.protection.outlook.com/?url=https*3A*2F*2Fwww.youtube.com*2Fchannel*2FUCtFDytX1hgjvlS4NH48M2oQ*2Fvideos&data=05*7C01*7CQ.Ou*40leeds.ac.uk*7Cd32d6c0d8be24d568e9708dab58d7217*7Cbdeaeda8c81d45ce863e5232a535b7cb*7C1*7C0*7C638021916489559763*7CUnknown*7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0*3D*7C3000*7C*7C*7C&sdata=*2FIt2unVg834JQ*2FmfJ6yZleKHFBtv5nw*2FqZfsp9PENAI*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJQ!!IKRxdwAv5BmarQ!YZ1X0VPFr6KVWRoFi91-CDI-kBjLUDQGw1cIW_451VC0Vxhh71v0H4ELOTYaM6TJOYMoaareRRWpsA$>




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End of Volcano Digest - 18 Nov 2022 to 21 Nov 2022 (#2022-121)
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