| NSF Org: |
EAR Division Of Earth Sciences |
| Recipient: |
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| Initial Amendment Date: | July 31, 2015 |
| Latest Amendment Date: | July 31, 2015 |
| Award Number: | 1547543 |
| Award Instrument: | Standard Grant |
| Program Manager: |
Luciana Astiz
lastiz@nsf.gov (703)292-4705 EAR Division Of Earth Sciences GEO Directorate for Geosciences |
| Start Date: | August 1, 2015 |
| End Date: | July 31, 2016 (Estimated) |
| Total Intended Award Amount: | $20,000.00 |
| Total Awarded Amount to Date: | $20,000.00 |
| Funds Obligated to Date: |
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| History of Investigator: |
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| Recipient Sponsored Research Office: |
2000 FLORIDA AVE NW LBBY WASHINGTON DC US 20009-1374 (202)462-6900 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
DC US 20009-1277 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): |
Geophysics, International Research Collab |
| Primary Program Source: |
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| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.050 |
ABSTRACT
The phenomena of slow slip, which includes slow slip events (SSE) and tectonic tremor (TT), have now been observed in nearly every subduction zone with dense geodetic and seismic networks and along some major crustal faults. Slow slip processes are now viewed by the seismological community as a crucial aspect of fault mechanics. Documents such as Seismological Grand Challenges in Understanding Earth?s Dynamic Systems and science plans for GeoPRISMS and EarthScope all point to the importance of studying slow slip. Previous conferences dedicated to slow slip have primarily focused on the Japan and Cascadia subduction zones. However new detailed studies in subduction zones in Alaska, Costa Rica, Mexico, New Zealand and fault zones such as the San Andreas and on faults beneath the Hawaiian volcano complex are providing additional observations. This Chapman Conference proposes to examine these phenomena globally and promote discussion and interaction by bringing together scientists working on Slow Slip in all places where they are observed.
The slow slip community is now beginning to move beyond just observational studies, as many new datasets and modeling studies in the last few years have begun to shed light on the physical processes that produce slow slip. These recent efforts towards understanding process make this workshop even very timely. The conference will focus on the following topics:1) Observations of slow slip phenomena, 2) Fault structure and physical conditions where slow earthquakes are observed, 3) Slow earthquakes and their relationship to large earthquakes and seismic hazard, 4) Models and laboratory experiments, 5) Improving observational methods for the analysis of slow slip phenomena. The meeting will occur over 3 days. Its format will include oral presentations and posters. Participation in the conference will be open to anyone with an active interest in slow slip/slow earthquake processes. We will invite key speakers to provide the observations and structure from each subduction zone, as well as modeling, and laboratory experiments.
PROJECT OUTCOMES REPORT
Disclaimer
This Project Outcomes Report for the General Public is displayed verbatim as submitted by the Principal Investigator (PI) for this award. Any opinions, findings, and conclusions or recommendations expressed in this Report are those of the PI and do not necessarily reflect the views of the National Science Foundation; NSF has not approved or endorsed its content.
The existence of repeated episodes of slow slip (popularly referred to as slow earthquakes) has challenged the classic view of the seismic cycle in subduction zones and mechanical models of fault evolution. Slow slip is widely observed in subduction zones and continental plate boundaries. A Chapman Conference on Slow Slip Phenomena, held in February in Ixtapa, Mexico, brought together more than 110 researchers to discuss fault structure and conditions that lead to slow slip. Speakers contrasted slow slip and associated phenomena with the behaviors of regular earthquakes. The phenomena include slow slip events that are so slow they must be observed by GPS networks, as well as seismically observed phenomena, such as tremor, low-frequency earthquakes, and very low frequency earthquakes. The phenomena exhibit different characteristics wherever they are observed across the globe. Thus, the community is still largely in the data gathering process to understand how and why those characteristics vary within the geological environment. Nonetheless, it is clear that Slow Slip Phenomena occur in a transition zone within the crust. That zone is the transition from the high friction, brittle region typically in the upper crust, to the lower crust where it is so hot and such high pressure that the rocks do not break, but deform.
Last Modified: 08/01/2016
Modified by: Pranoti Asher
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