Lower crustal intrusion and role of detachment faulting during continental breakup

Derek Keir, Cecile Doubre, Hakim Ahmed, Alessandro La Rosa, Carolina Pagli, Sylvie Leroy
2020
This is a Full Scientific Report resulting from NERC Geophysical Equipment Facility Loan 1054, principal investigator Dr Derek Keir

Abstract

SEIS-UK provided a loan of 10 broadband seismic systems (7 x ESPD and 3 x 40T) for deployment in Ethiopia during May 2017 until October 2018. The network covers a profile across the north western margin of Afar. The instruments recorded continuously at 100 samples per second, with relatively minor data losses due to equipment problems. The dataset has been archived in the SEISUK data management system and will be archived with IRIS (Incorporated Research Institutions for Seismology). We have analysed the distribution and magnitudes of seismicity, and focal mechanisms, during a major mainshock and aftershock sequence near the network in March 2018. In addition, we have analysed teleseismic earthquake through the duration of the project for receiver functions in order to constrain crustal structure.

Full Report

Lower crustal intrusion and role of detachment faulting during continental breakup PDF(1.6 Mb)
Cite as:
Keir, D., Doubre, C., Ahmed, H., La Rosa, A., Pagli, C., Leroy, S., "Lower crustal intrusion and role of detachment faulting during continental breakup", NERC Geophysical Equipment Facility, Scientific Report 1054, 2020