TY - JOUR

T1 - Deciphering aseismic deformation along submarine fault branches below the eastern Sea of Marmara (Turkey)

T2 - Insights from seismicity, strainmeter, and GNSS data

AU - Durand, V.

AU - Gualandi, A.

AU - Ergintav, S.

AU - Kwiatek, G.

AU - Haghshenas, M.

AU - Motagh, M.

AU - Dresen, G.

AU - Martínez-Garzón, P.

N1 - Funding Information: Data from the strainmeters is based on services provided by the GAGE Facility, operated by UNAVCO, Inc., with support from the National Science Foundation and the National Aeronautics and Space Administration under NSF Cooperative Agreement EAR-1724794 . The seismicity catalog is retrieved from the KOERI website (B.U. KOERI-RETMC), http://www.koeri.boun.edu.tr/sismo/2/earthquake-catalog/ . The GNSS data have been recorded through an EU-funded Research Program, the MARSITE Integrated Project (contract N° 308417). V.D. and P.M.G. acknowledge funding from the Helmholtz Association in the frame of the Young Investigators Group VH-NG-1232 (SAIDAN). AG acknowledges funding from the European Research Council Advanced Grant 835012 (TECTONIC).

PY - 2022/9/15

Y1 - 2022/9/15

N2 - The recently observed slow transients in the Sea of Marmara are important to quantify the seismic hazard and risk for the greater Istanbul metropolitan region. In this study, we analyze and characterize a slow slip event that occurred in the Eastern Sea of Marmara in 2016. To characterize the temporal history and the location of this event, we combine for the first time in this region different types of geodetic data (strainmeters and GNSS stations) and seismicity. We propose two interpretations to explain the observations: either the slow event initiated on the western part of the Armutlu fault and then propagated approximately 40 km eastward, or it initiated on the western section of the Armutlu fault, and then jumped onto a perpendicular fault after propagating ca. 15 km. We deduce these interpretations from forward modeling of the strain and displacement data. In addition, our results also suggest that this slow event triggered seismicity on a neighboring perpendicular fault.

AB - The recently observed slow transients in the Sea of Marmara are important to quantify the seismic hazard and risk for the greater Istanbul metropolitan region. In this study, we analyze and characterize a slow slip event that occurred in the Eastern Sea of Marmara in 2016. To characterize the temporal history and the location of this event, we combine for the first time in this region different types of geodetic data (strainmeters and GNSS stations) and seismicity. We propose two interpretations to explain the observations: either the slow event initiated on the western part of the Armutlu fault and then propagated approximately 40 km eastward, or it initiated on the western section of the Armutlu fault, and then jumped onto a perpendicular fault after propagating ca. 15 km. We deduce these interpretations from forward modeling of the strain and displacement data. In addition, our results also suggest that this slow event triggered seismicity on a neighboring perpendicular fault.

KW - aseismic deformation

KW - seismicity

UR - http://www.scopus.com/inward/record.url?scp=85134885942&partnerID=8YFLogxK

U2 - 10.1016/j.epsl.2022.117702

DO - 10.1016/j.epsl.2022.117702

M3 - Article

AN - SCOPUS:85134885942

VL - 594

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

M1 - 117702

ER -