CE49 - Planétologie, structure et histoire de la Terre

Detecting transient strain along the Haiyuan fault, China – X-STRAIN

Submission summary

Continuous improvement of seismological and geodetic instruments is the key for unraveling the physics of earthquakes. Since the 2000’s, the maturity of dense geodetic networks and satellite observations has revealed the complex interplay between slow fault slip and devastating earthquakes. Our understanding of the behavior of active faults is now limited by the detection capabilities of current geodetic methods. Strainmeters led to the early discovery of transient creep on continental faults that remained invisible beforehand. However, these detections were made by one or two instruments, leading to unreliable interpretations in term of slip location and fault physics. Because these instruments do not measure the full strain tensor, we aim will use a new optical strainmeter measuring the 6 strain tensor components. Together with GPS instruments, INSAR observations and seismometer, these strainmeters will be deployed along the Haiyuan fault in mainland China.

Project coordination

Jean Chery (Géosciences Montpellier)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

GEOSCIENCES MONTP. Géosciences Montpellier
LGL-TPE Laboratoire de géologie de Lyon : Terre, planètes et environnement
LAAS-CNRS Laboratoire d'analyse et d'architecture des systèmes du CNRS

Help of the ANR 627,648 euros
Beginning and duration of the scientific project: May 2022 - 48 Months

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