Multiple Announcements: White Paper for Comment, GSA Session, COMET Webinar, and Job Opportunity

Dear SCEC Community,

Please see below for the following announcements:

1. Extension to 1/22/21: Surface Topography and Vegetation draft white paper for comment
2. GSA Cordilleran Meeting Session Announcement
3. COMET Webinar - Fabien Albino - 20 January 16:00UK time
4. Position for a Seismic Field Tech

Regards,

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1. Extension to 1/22/21: Surface Topography and Vegetation draft white paper for comment:
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Dear Surface Topography and Vegetation colleagues,

We have extended the comment period for the Surface Topography and Vegetation Incubation Study Draft White Paper to January 22, 2021.

We value you input and comments on the white paper. The white paper and a link for providing input can be found at the STV web page:

https://science.nasa.gov/earth-science/decadal-stv/

Please spread the word to individuals or through e-mail lists.

Sincerely yours,

Andrea Donnellan on behalf of the
Surface Topography and Vegetation Incubation Study Team

2. GSA Cordilleran Meeting Session Announcement:
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Please consider submitting an abstract to the 2021 GSA Cordilleran Section Meeting to be held virtually May 12-14, 2021. Abstracts are due February 9, and a list of the technical Programs can be found here: https://www.geosociety.org/GSA/Events/Section_Meetings/GSA/Sections/cd/2...

In particular, my colleagues and I are offering as session dedicated to Late Cretaceous–Paleogene Tectonism from the Southwestern Cordillera to the Rocky Mountains (T12) Richard V. Heermance, Scott M. Johnston, John Singleton, Jacob Thacker, Kevin Hobbs, Theresa M. Schwartz, and Nikki Seymour.
Description: Western North America is a type locality for tectonism related to flat-slab subduction. However, the timing, style, and extent of tectonism and the processes involved remain enigmatic. We encourage submissions that focus on tectonism and its products during this timeframe. Submit an abstract to this session

Other meeting highlights include:
· entirely different platform from the GSA national meeting and will be focused on interaction among attendees!
· registration fees are low (e.g., $100 for professionals/ $25 for students if GSA members)!
· virtual field trips are FREE if you register for the meeting!
· student career lunches and workshops will still be offered!

We look forward to your submissions.

3. COMET Webinar - Fabien Albino - 20 January 16:00UK time:
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Dear Colleagues,

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

Coming up:

How active volcanism changes topography: Insights from satellite InSAR measurements at Agung and Fuego

Dr. Fabien Albino (University of Bristol)

Wednesday the 20th of January 2021 at 16:00 UK time (GMT)

Please register at: https://universityofleeds.zoom.us/webinar/register/WN_m_ZaQ8CdTxKbfyZ9kf...
(After registering, you will receive a confirmation email containing information on how to join the webinar)

Abstract

Over the past three decades, satellite radar interferometry (InSAR) has shown its ability to detect ground deformation and topographic changes associated with volcanic activity. Although InSAR has a much better spatial resolution than ground instrumentation, most of the InSAR ground deformation signals are still detected a-posteriori due to delays for acquiring and processing the data. Thanks to the Sentinel-1 mission, the near real-time monitoring of volcanic ground deformation is now achievable with InSAR, as data are freely available only 1-2 hours after acquisitions. Using the automated InSAR processing chain LïCSAR, we are able to produce time series of ground deformation to response rapidly to ongoing volcanic crisis such as the 2017 seismic crisis at Agung volcano (Albino et al., 2019). For this tropical volcano, we first show that the corrections of atmospheric signals in the interferograms are crucial to extract ground deformation signals (Albino et al., 2020a). We then detect a persistent 5 km radius uplift signal of 8-10 cm on the north flank of Agung volcano prior to the 2017 November eruption. Numerical inversion of InSAR data using 3D FEM models indicates that the ground deformation signal is consistent with a deep sub-vertical magma intrusion located at midway between Agung and its neighbor, Batur caldera.

Bi-static missions such as TanDEM-X are designed for the production of high-resolution Digital Elevation Model (DEM), as phase changes are only dependent on terrain. Although TanDEM-X DEMs have been widely used to quantify the thicknesses of lava flows, until now, the method had not been applied to pyroclastic flows, because the thin deposits are often emplaced in steep-sided valleys where DEM accuracy is expected to be low. Here, we demonstrate the benefit of TanDEM-X DEMs to characterize the spatial distribution of the topographic changes associated with the emplacement of the Pyroclastic Density Currents (PDC) during the 2018 Fuego eruption (Albino et al., 2020b). Erosion and collapses of 30 m occurred close to the summit whereas the deposits (up to 25 meters) mainly accumulated inside the main channel of the SE flank. Analysis of the volume budget indicates that a large proportion of the PDC volume originated from the summit collapse, which confirms that bulking increases the run-out distance of pyroclastic flows and explains why the 2018 eruption was particularly destructive.

References

Albino, F., Biggs, J., & Syahbana, D. K. (2019). Dyke intrusion between neighbouring arc volcanoes responsible for 2017 pre-eruptive seismic swarm at Agung. Nature communications, 10(1), 1-11.

Albino, F., Biggs, J., Yu, C., & Li, Z. (2020a). Automated Methods for Detecting Volcanic Deformation Using Sentinel‐1 InSAR Time Series Illustrated by the 2017–2018 Unrest at Agung, Indonesia. Journal of Geophysical Research: Solid Earth, 125(2), e2019JB017908.

Albino, F., Biggs, J., Escobar-Wolf, R., Naismith, A., Watson, M., Phillips, J. C., & Marroquin, G. C. (2020b). Using TanDEM-X to measure pyroclastic flow source location, thickness and volume: Application to the 3rd June 2018 eruption of Fuego volcano, Guatemala. Journal of Volcanology and Geothermal Research, 107063.

Best wishes,
Tamarah King & Chris Rollins

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

4. Position for a Seismic Field Tech:
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Job Title: Field/Electronic Technician

Employer: Caltech, Pasadena, CA

Job Summary:
The Caltech Seismo Lab seeks a candidate who is interested in doing technical work in the southern California outdoors. The ideal candidate should be an outdoors person (such as avid hiker, biker, or camper) who enjoys working in the remote desert or mountains maintaining equipment that detects earthquake signals. This field/electronic technician will participate in the upgrade and operation of the Caltech/USGS southern California earthquake monitoring network (SCSN). The duties include long drives, sometimes off road, field work and prep-work for deployment and maintenance of solar panel power systems, seismic sensors, dataloggers, digital data communications, including radios, satellite systems, cell-phone modems, DSL, and the Internet.

Please Apply here: https://tinyurl.com/y2pepkjr

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