FN Archimer Export Format
PT J
TI Earthquake location and detection modeling for a future seafloor observatory along Mayotte's volcanic ridge
BT 
AF Aiken, Chastity
   Saurel, Jean-Marie
   Foix, Oceane
AS 1:1;2:2;3:1;
FF 1:PDG-REM-GM-LAD;2:;3:PDG-REM-GM-LAD;
C1 Ifremer, REM, GM, LAD, Plouzané 29280, France
   Institut de Physique du Globe de Paris (IPGP), Paris, France
C2 IFREMER, FRANCE
   IPGP, FRANCE
SI BREST
SE PDG-REM-GM-LAD
IN WOS Ifremer UPR
   copubli-france
IF 2.986
TC 0
UR https://archimer.ifremer.fr/doc/00700/81160/85392.pdf
   https://archimer.ifremer.fr/doc/00700/81160/85393.docx
LA English
DT Article
CR MAYOBS
   MAYOBS1
   MAYOBS10
   MAYOBS13-1
   MAYOBS13-2
   MAYOBS2
   MAYOBS3 - MD222
   MAYOBS4
   MAYOBS6
   MAYOBS7
   MAYOBS8
   MAYOBS9
   MD 228 / MAYOBS15
BO Marion Dufresne
DE ;Seafloor observatory;Modeling;Location;Detection;Earthquakes;Volcanic system
AB The volcano-seismic crisis afflicting Mayotte since May 2018 has motivated France-based seismologists to consider the installment of a permanent seafloor observatory with one or more seismometers for monitoring surfacing magma and the associated seismicity. In general, deploying a seismometer offshore is known to improve earthquake location – particular in depth – and lower magnitude detection. However, how true are these claims for Mayotte when a land-based seismic network already exists? To address this, we investigate location and detection performance when deploying permanent seismometers offshore Mayotte. We modeled location and detection performance using both real and synthetic data in different network configurations. We found that, in the case of Mayotte, only longitude error is significantly reduced by adding seismometers offshore, perhaps due to the North-South configuration of the land network. Moreover, the size of the Mayotte volcano monitoring area, which spans depths and distances up to 50 km for both, prevents accurate location and detection performance with less than 2 permanent seismometers offshore. Therefore, we would need at least 2 cabled seismometers to monitor this volcanic system, i.e. locate and detect events in real-time. Overall, our modeling suggests that a one-side land network can perform relatively well by itself in location (errors <5 km) and detection (magnitude >1.3) so long as the seismicity occurs at epicentral distances and depths <20 km. However, beyond this distance, one or more seafloor seismometers would be needed to improve location and detection performance.   
PY 2021
PD OCT
SO Journal Of Volcanology And Geothermal Research
SN 0377-0273
PU Elsevier BV
VL 418
UT 000683567100005
DI 10.1016/j.jvolgeores.2021.107322
ID 81160
ER

EF