GD
Geodynamics

Earthquakes

4th Cargèse School on Earthquakes: Nucleation, Triggering, Rupture, and Relationships to Aseismic Processes

October 30, 2024
Group photograph of the participants of the 4th edition of Cargèse school on earthquakes. Credit: Anthony Sladen.
Participants of the 4th edition of Cargèse school on earthquakes. Credit: Anthony Sladen.

How do earthquakes nucleate? How do they arrest? Can we predict or control them? How do fault zone structure and rheology influence rupture? What do earthquakes in the lab tell us? How does fluid injection modulate seismicity? The Institut des Etudes Scientifiques de Cargèse (IESC) premise in Corsica, France was abuzz with discussions about these and many other related questions this October. The ...[Read More]

Study of the Lithospheric deformations, Earthquakes, Tsunamis, Volcanic eruptions and their imprints in Atmosphere using Space Geodetic Observations

and March 8, 2023
Study of the Lithospheric deformations, Earthquakes, Tsunamis, Volcanic eruptions and their imprints in Atmosphere using Space Geodetic Observations
Credit: Katsumi Hattori, presented in Ouzounov et al, 2018, Chapter 20

The fundamental of Space Geodesy is the observation of the dynamics of the Earth, such as its rotation on its axis, changes in shape, and the external gravitational field etc., which allow for the monitoring of the Earth system in general. Space Geodetic techniques, such as Global Navigation Satellite Systems (GNSS) / Global Positioning System (GPS), as well as Interferometric Synthetic Aperture R ...[Read More]

Investigating earthquake activity of the 2018 Kīlauea Volcano eruption

and March 16, 2022
Photograph of Kīlauea’s summit, Halema’uma’u Crater, partway through the 2018 eruption. The seismic events at the summit and associated eruptive activity greatly changed the structure of the summit and surrounding region. Photograph by Hawaiian Volcano Observatory on June 12, 2018 (https://www.usgs.gov/media/images/k-lauea-volcano-halema-uma-u-crater-0).
Photograph of Kīlauea’s summit, Halema’uma’u Crater, partway through the 2018 eruption. The seismic events at the summit and associated eruptive activity greatly changed the structure of the summit and surrounding region. Photograph by Hawaiian Volcano Observatory on June 12, 2018 (https://www.usgs.gov/media/images/k-lauea-volcano-halema-uma-u-crater-0).

Both earthquakes and research project directions can be hard to predict. This week Becky Fildes, a graduate student at UC Davis, takes us on a journey of how she came to study earthquake behavior in Hawaii during an active volcanic eruption and how our understanding of caldera collapses can be further improved. In my first year of graduate school in 2017, I had started studying earthquake statisti ...[Read More]