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2026 SCEC UNREST Workshop
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The SCEC UNREST workshop, to be held in Pismo Beach, California on June 2-3, 2026, will convene earthquake geologists and modelers to address key limitations in how geologic observations of faulting and past earthquakes are incorporated into earthquake-cycle, seismic hazard, and geodetic models. A central focus will be the improved curation, organization, and interpretation of geologic and geometric fault and earthquake datasets to better support model testing and validation.
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The specific goals of the workshop are to:
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- Foster sustained collaboration between modelers and researchers who generate geologic records of fault slip, rupture extent, slip rates, and the timing and regularity or irregularity of past earthquakes across California.
- Identify and prioritize the types and locations of geologic data that are most needed to reduce uncertainties in seismic hazard models and to more rigorously evaluate earthquake simulators.
- Constrain and explore the implications of discrepancies between deformation models informed by geologic data and those based primarily on geodetic observations.
The primary outcome of the workshop will be a written planning document that defines the scientific and data priorities for a new community effort focused on Understanding Natural Recurrence of Earthquakes and Slip over Time (UNREST). The UNREST plan will articulate priorities for new or enhanced open‑source geologic cyberdatabases needed by the modeling community, and will outline collaborative research directions to be pursued jointly by geologists and modelers.
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An optional all-day field trip is planned for June 1, beginning with a visit to the Carrizo Plain to examine key features of the San Andreas Fault. Stops will focus on constraints on fault slip rate, evidence of recent surface-rupturing earthquakes, and implications for earthquake timing. The trip will then proceed westward toward the central Coast region, with additional observations of active fault systems and regional seismic hazard considerations. The day concludes at the Diablo Canyon Nuclear Power Facility near Pismo Beach, where discussions will address the interaction between active tectonics, site characterization, and infrastructure risk assessment.
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We welcome applications from, and aim to achieve a balanced representation of, participants from two complementary research communities: observational and field-based geoscientists and modelers.
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We also seek a balance across career stages, including graduate students, early-career researchers, and established investigators, to promote cross-generational exchange and collaboration. Workshop capacity is limited to 35 participants, who will be selected based on their statement of interest and the potential contribution to the workshop objectives. The application deadline is April 15, 2026, and accepted participants will be notified by April 24, 2026, with details on registration payments, hotel reservations, and additional travel support if applicable.
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We look forward to seeing you at the upcoming workshop!
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UNREST Workshop Conveners (Sally McGill, Kim Blisniuk, Michael Oskin, Scott Marshall)
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