Post-diking deformation in Harrat Lunayyir (Saudi Arabia) from InSAR
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Post-diking deformation in Harrat Lunayyir (Saudi Arabia) from InSAR. / Nobile, Adriano; Cao, Yunmeng; Youssof, Mohammad; Trippanera, Daniele; Passarelli, Luigi; Jónsson, Sigurjón.
In: EGU General Assembly 2020, Vol. 22, 01.05.2020, p. 8272.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Post-diking deformation in Harrat Lunayyir (Saudi Arabia) from InSAR
AU - Nobile, Adriano
AU - Cao, Yunmeng
AU - Youssof, Mohammad
AU - Trippanera, Daniele
AU - Passarelli, Luigi
AU - Jónsson, Sigurjón
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Magmatic intrusions often produce ground deformation that can be studied by geodetic techniques. In the past two decades, many volcanic dike and sill emplacements (sometimes associated to eruptions) in different tectonic settings have been analyzed through InSAR. However, in only a few cases, the post-intrusive behavior has been studied. Here we analyze the post-diking deformation in Harrat Lunayyir, which is a mononogenetic volcanic field located in western Saudi Arabia on the eastern margin of the Red Sea Rift.Between April and July 2009, an intensive seismic swarm occurred in the area with many earthquakes above magnitude 4 and the largest earthquake of Mw 5.7. InSAR data showed that the earthquake swarm was triggered by the emplacement of a dike intrusion that stopped only ~1 km below the surface. Dike length was estimated to be ~7 km and with a maximum opening 4 m. Above the intrusion, a ~10 km long and ~5 km wide graben formed during the activity with up to 1 m of fault slip on the border faults. In the post diking phase up to present, micro-sesmicity (0
AB - Magmatic intrusions often produce ground deformation that can be studied by geodetic techniques. In the past two decades, many volcanic dike and sill emplacements (sometimes associated to eruptions) in different tectonic settings have been analyzed through InSAR. However, in only a few cases, the post-intrusive behavior has been studied. Here we analyze the post-diking deformation in Harrat Lunayyir, which is a mononogenetic volcanic field located in western Saudi Arabia on the eastern margin of the Red Sea Rift.Between April and July 2009, an intensive seismic swarm occurred in the area with many earthquakes above magnitude 4 and the largest earthquake of Mw 5.7. InSAR data showed that the earthquake swarm was triggered by the emplacement of a dike intrusion that stopped only ~1 km below the surface. Dike length was estimated to be ~7 km and with a maximum opening 4 m. Above the intrusion, a ~10 km long and ~5 km wide graben formed during the activity with up to 1 m of fault slip on the border faults. In the post diking phase up to present, micro-sesmicity (0
U2 - 10.5194/egusphere-egu2020-8272
DO - 10.5194/egusphere-egu2020-8272
M3 - Journal article
VL - 22
SP - 8272
JO - EGU General Assembly 2020
JF - EGU General Assembly 2020
ER -
ID: 303366669