TY  - JOUR
A1  - Cesca, Simone
A1  - Sugan, Monica
A1  - Rudzinski, Lukasz
A1  - Vajedian, Sanaz
A1  - Niemz, Peter
A1  - Plank, Simon
A1  - Petersen, Gesa
A1  - Deng, Zhiguo
A1  - Rivalta, Eleonora
A1  - Vuan, Alessandro
A1  - Linares, Milton Percy Plasencia
A1  - Heimann, Sebastian
A1  - Dahm, Torsten
T1  - Massive earthquake swarm driven by magmatic intrusion at the Bransfield Strait, Antarctica
T2  - Communications earth and environment
N2  - An earthquake swarm affected the Bransfield Strait, Antarctica, a unique rift basin in transition from intra-arc rifting to ocean spreading. The swarm, counting similar to 85,000 volcano-tectonic earthquakes since August 2020, is located close to the Orca submarine volcano, previously considered inactive. Simultaneously, geodetic data reported up to similar to 11 cm north-westward displacement over King George Island. We use a broad variety of geophysical data and methods to reveal the complex migration of seismicity, accompanying the intrusion of 0.26-0.56 km(3) of magma. Strike-slip earthquakes mark the intrusion at depth, while shallower normal faulting the similar to 20 km long lateral growth of a dike. Seismicity abruptly decreased after a Mw 6.0 earthquake, suggesting the magmatic dike lost pressure with the slipping of a large fault. A seafloor eruption is likely, but not confirmed by sea surface temperature anomalies. The unrest documents episodic magmatic intrusion in the Bransfield Strait, providing unique insights into active continental rifting.
Y1  - 2022
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/64372
SN  - 2662-4435
VL  - 3
IS  - 1
PB  - Springer Nature
CY  - London
ER  -