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

Qi Ou Q.Ou at
Mon Nov 21 16:31:12 UTC 2022

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:

(After registering, you will receive a confirmation email containing information on how to join the webinar)


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 (Pu‘u ‘Ō‘ō Crater, Kīlauea, Hawai’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:/<>

Best wishes,

Scott Watson & Qi Ou

COMET - Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics<>


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