The East African Institute for Fundamental Research (EAIFR) and the International Centre for Theoretical Physics (ICTP) wish to inform those who may be interested of a GEO@EAIFR webinar. This seminar will take place on April 25, 2024 and will be broadcast live on ZOOM. It will also be recorded and later posted on the ICTP-EAIFR YouTube channel, where one can find the previous recorded GEO@EAIFR webinars. Below all the details:

Speaker: Diana Roman, H.O. Wood Chair of Seismology in Carnegie’s Earth and Planets Laboratory, USA

Title: Seismic Characterization of Volcanic Systems and Eruption Mechanisms

When: April 25, 2024 at 16:30  (Kigali time).

Register in advance for this meeting by clicking here.

All are very welcome.

Abstract:

Magmatic processes generate a wide range of seismic phenomena, and a pronounced increase in seismicity is one of the most consistently-observed precursors to a volcanic eruption. With the spread of permanent monitoring networks on volcanoes in recent decades, it has become evident that many (most?) episodes of volcano-seismic unrest do not immediately culminate in eruption. Furthermore, recent retrospective analyses of volcano-seismic data spanning full eruption cycles suggest a possible link between episodes of magma intrusion that do not immediately culminate in eruption and the nature of the eventual eruption (for example, the nature of the run-up to eruption, the eruption’s duration and style). Where available, other geophysical observations, such as deformation and thermal emissions, corroborate this emerging perspective. This talk will focus on the unique challenges of conducting seismology research on volcanoes, and will highlight several recent case studies at volcanoes in Alaska and Latin America that demonstrate how volcano-seismic unrest and quiescence reflect magmatic processes on timescales from decades to seconds.

Biography:

Diana Roman is currently H.O. Wood Chair of Seismology in Carnegie’s Earth and Planets Laboratory, and has been a Carnegie Staff Scientist since 2011. Her research straddles the boundary between volcanology and seismology, with a dual focus on understanding the nature of magma ascent and eruption and of volcanic microearthquake swarms. Specifically, she works to understand, from a mechanical perspective, the formation, evolution, and dynamics of crustal magmatic systems and the source mechanisms and causes of microearthquake swarms occurring in the vicinity of active volcanoes. These two lines of research are tied together through development of conceptual and numerical models of the interaction of tectonic and volcanic processes. Dr. Roman was a co-author of the 2017 U.S. National Academy Consensus Report "Volcanic Eruptions and Their Repose, Unrest, Precursors, and Timing". Since 2016, Dr. Roman has co-led the SZ4D Initiative (www.sz4d.org), a planned decadal-scale effort to understand fundamental processes underlying Earth’s largest geohazards. Since 2019, Dr. Roman has also served as an Editor-in-Chief of the Journal of Volcanology and Geothermal Research.