Upper-plate normal faults along forearcs often accumulate slip during > Mw 6 earthquakes. Such normal faults traverse the forearc of the Hellenic Subduction System (HSS) in Greece and are the focus of this study. Here, we use detailed field-mapping and analysis of high-resolution Digital Elevation Models (DEMs) to study 42 active normal faults on the islands of Kythira and Antikythira in the Aegean Sea. Onshore fault kinematic data are complemented by seabed bathymetry mapping of ten offshore faults that extend along the Kythira-Antikythira Strait (KAS). We find that normal faults in the KAS have lengths of ~1-58 km and scarps ranging in height from 1.5 m to 2.8 km, accommodating, during the Quaternary, trench-orthogonal (NE-SW) extension of ~2.46 ± 1.53 mm/a. Twenty-eight of these faults have ruptured since the Last Glacial Maximum, with their postglacial (16±2 ka) displacement rates (0.19-1.25 mm/a) exceeding their Quaternary (≤ 0.7-3 Ma) rates (0.03-0.37 mm/a) by more
Frontiers | Paleoseismological Findings at a New Trench Indicate the 1714 M8 1 Earthquake Ruptured the Main Frontal Thrust Over all the Bhutan Himalaya
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strong enough to have been felt all the way in mexico city and guatemala city. that s right. do you have any information it s large enough it s large enough that it s going to be felt that far away. okay. large enough that it will be felt that far away. in terms of the data that you will be looking at, in terms of the hours ahead, what is it you ll be keeping an eye out for? i believe it will be working aftershocks to determine the rupture area of this earthquake. and we will be definitely keeping an eye on what the tsunami has been along the coast. okay. jana pursley, we appreciate you joining us and giving us the information you have at this point in time. we know this is a developing story, and you re working to get more data. so thank you for joining us at this point in time. i want to go right now to our own karen maginnis in atlanta, who is following not just irma, because we are keeping an eye on
yet yesterday? is that even possible? that s unlikely. one of the concerns that remains is that with after shocks, there s potential for additional tsunamis to be generated and for any under water slumps that could result with unstable ground beneath the sea. when you talk about after shocks, how great can they be? when you re looking at an 8.9 earthquake and if you see something that comes in like 27 magnitude, is that an after shock or is that an entirely separate earthquake on its own? that depends. a normal after shock would be within one fault length of the main shock. the other thing is that the main rupture area can extend, so sometimes you ll see other earthquakes off the ends of a bigger earthquake that s just happened. take a look at what has happened, particularly in the