Michael Manga, Professor

Closed (1) Monitoring California's volcanoes through their hydrology

Closed. This professor is continuing with Fall 2018 apprentices on this project; no new apprentices needed for Spring 2019.

Unrest at volcanoes (and their eruption) affects fluids in the crust and the temperature, discharge and composition of water at springs around volcanoes. At present, these springs are not well monitored. The first step in this project is to identify where we should monitor springs and what data exists. The second step is to make measurements at some of these springs. At the same time existing data can be used to answer key questions for interpreting this data: are there signals from climate change? can we measure how much heat the volcano is producing? do we see changes from earthquakes or unrest at the volcanoes?

The project will begin by looking for existing data in library and web resources and geological maps. A field trip is possible.

Day-to-day supervisor for this project: Michael Manga

Qualifications: Some familiarity with Earth science. Experience with handling data would be useful.

Weekly Hours: to be negotiated

Related website: http://seismo.berkeley.edu/~manga/

Closed (2) Imaging magma under California volcanoes with seismic attenuation

Closed. This professor is continuing with Fall 2018 apprentices on this project; no new apprentices needed for Spring 2019.

Understanding the dynamics beneath active volcanoes requires identifying the presence and position of magma bodies. Geophysical imaging, specially seismic tomography, is becoming a widely used technique for this purpose. However, there are still uncertainties related to the interpretation of tomography images and the joint interpretation of different physical parameters seems to be a better way to recognize and interpret volcanic structures.

Recent publications demonstrate that seismic attenuation (Q) is an useful parameter due to its strong relationship to temperature and the structural complexity of the medium.

The student involved in the URAP project will learn about seismic imaging at active volcanoes and will interpret obtained Q-images together with other geophysical images (magnetotellurics, seismic velocity).

Download seismic data from IRIS (data repository); analyze data with codes that are already written; eventually, create image of the volcano

Day-to-day supervisor for this project: Janire Prudencio, Post-Doc

Qualifications: matlab; some familiarity with Earth science; some understanding of wave physics will be useful

Weekly Hours: to be negotiated

Related website: seismo.berkeley.edu/~manga

Closed (3) Examining Mars geology for signatures of past Martian moons

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Although originally thought to be captured asteroids, there is growing consensus that the Martian moons Phobos and Deimos were created from a debris disk caused by a giant impact into Mars (a similar process to the formation of Earth’s Moon). Models of Martian moon formation from a giant impact predict that several other moons would also have been produced, and would have spiraled inward and impacted Mars billions of years ago. We seek a student to examine the crater record and geology of Mars for signatures of past moons that impacted the Martian surface.

The student will learn to work with global data sets of Mars, including satellite imagery, to examine ancient Martian surfaces and impact craters. The student can approach the project in several different ways, and could apply computer programming, geophysics modeling, and machine learning, if desired.

Day-to-day supervisor for this project: Robert Citron, Ph.D. candidate

Qualifications: computer skills and interest in planetary science

Weekly Hours: to be negotiated

Related website: http://seismo.berkeley.edu/~manga
Related website: https://www.nature.com/articles/ncomms4660

Closed (4) Imaging deforming magma

Closed. This professor is continuing with Fall 2018 apprentices on this project; no new apprentices needed for Spring 2019.

Forecasting volcanic eruptions relies upon understanding the ascent and failure of magmas in the shallow conduit. However, we cannot observe these underground processes in-situ, and thus we often rely upon the textures of erupted rocks to interpret them. In order to simulate magmatic conditions and understand how these textures develop, we conduct magma deformation experiments on natural dacite samples acquired from the 1980 Mt. St. Helens eruption. Synchrotron x-ray tomography is used to obtain 3-D images of the microstructure during deformation.

The student involved will learn x-ray tomography and high-temperature magma deformation experimental techniques, as well as become acquainted with synchrotron science. The student will conduct data analysis on the acquired images.

Day-to-day supervisor for this project: Ari Melinger-Cohen, Graduate Student

Qualifications: Some familiarity with earth science and interest in synchrotron science and image analysis.

Weekly Hours: to be negotiated

Off-Campus Research Site: LBNL

Related website: http://seismo.berkeley.edu/~manga