The deadline for the EGU 2013 meeting is approaching, so if you want to submit an abstract or if you plan to apply for a grant, now is the time. I would like to draw your attention to the following sessions again, which are the closest to earthquake geology, I think. Deadlines are November 30 for Support Applications and January 9 for receipt of Abstracts.
TS8.1/NH4.6/SM2.2 – Active Tectonics and the Earthquake Cycle
Active Tectonics studies may shed light onto the understanding of the long-term and short-term deformation patterns in intraplate domains and along plate boundaries. A wide range of approaches such as paleoseismology, paleogeodesy, paleotsunami investigations, tectonic geomorphology and high-resolution datation methods bring unprecedented constraints on the identification of active structures, the distribution of associated deformation and the size and timing of past earthquakes. This, in turn, may be used to better understand i) the earthquake cycle through the characterization of its inter-seismic, co-seismic and post-seismic periods and ii) related hazard (including earthquake, tsunami and triggered mass movements) through the characterization of recurrence patterns.
This session seeks contributions on the study of earthquake-prone areas in interplate and intraplate regions that combine approaches such as earthquake geology and geomorphology, seismotectonics, geophysical imaging (including GPR and seismics) and remote sensing (including InSAR and LiDAR surveys). We also encourage contributions that incorporate such observations into seismic hazard assessment.
TS8.2/SM2.7 – Earthquake Geology: methodological aspects and case studies
Geological Sciences represent a crucial perspective for investigating past earthquakes and possibly predicting (middle-long term) future ones. Indeed, many moderate to strong crustal events produce direct and permanent effects on the earth surface (i.e. morphogenic earthquakes) and therefore “earthquake geologists” can recognise, describe, measure, analyse and interpret all these linear and/or areal features from superficial-shallow investigations. Geological Sciences can investigate both single-event effects (even several years after they were formed) as well as the cumulative ones.
Geological investigations of past earthquakes is also of primary importance for seismic hazard assessment, which requires the interplay of different disciplines and expertises. For example, geological studies can provide crucial information for regions where instrumental seismic records or detailed historical accounts are not available, but that generated destructive earthquakes in the past and may generate similar events in the future. Geological approaches to the investigation of past earthquakes are fundamental to contribute to determine or to infer important parameters for seismic hazard assessment, including the maximum expected magnitude, the return period for a given magnitude and the mean slip-rate.
In this session, we welcome contributions focusing on all methodological aspects and different approaches used by the geological community to investigate active faults. Both theoretical issues and case studies describing and critically discussing any geological aspect of earthquakes and seismogenic faults are expected. We look forward to a lively and cross-disciplinary programme that will bring together a broad range of expertises to discuss on the crucial contribution of Geological Sciences to the investigation of earthquakes and to seismic hazard assessment.
TS9.5 Advances in paleostress/strain reconstructions in tectonic studies : methods, applications, perspectives
Stress states in the Earth’s crust are of fundamental importance, they determine how rocks deform, how fracture and fold patterns develop and how faults behave. In general, the access to ancient states – paleo-stresses – is allowed by different methods that give mainly reduced stress tensors, focusing on the direction of paleo-stress axes, while only few provide differential stresses, and even fewer both quantities.
The session aims at making the point on the advances in methods of paleo-stress/strain analysis and at evaluating how paleo-stress/strain reconstructions contribute to tectonic studies, both in terms of orientations and magnitudes. We also would like to discuss keys and pitfalls in paleostress reconstructions, to move forward the long-lived debate on stress vs strain vs kinematic interpretation of fault slip data and other geological indicators, and to estimate to what extent paleo-stresses can be compared with modern stresses in terms of distribution in time and space and of geological and physical meanings. We would also like to tackle the need for new improved techniques and/or the way existing ones can be more thoughtfully combined and applied. Our ultimate wish would be to bring together researchers who work on these topics. We welcome a wide range of contributions : methodological contributions, contributions that use paleo-stress/strain analyses to decipher the regional polyphase tectonic history, to better constrain fold kinematics and to improve our understanding of reactivation mechanisms and strain partitioning in the brittle regime, as well as modeling studies of stress states at the local or regional scale.