Počet záznamů: 1
Three large prehistoric earthquakes in the Eastern Alps evidenced by cave rupture and speleothem damage
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SYSNO ASEP 0557129 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Three large prehistoric earthquakes in the Eastern Alps evidenced by cave rupture and speleothem damage Tvůrce(i) Baroň, Ivo (USMH-B) ORCID, SAI
Plan, L. (AT)
Grasemann, B. (AT)
Melichar, R. (CZ)
Mitrović-Woodell, I. (AT)
Rowberry, Matthew David (USMH-B) RID, ORCID, SAI
Scholz, D. (DE)Celkový počet autorů 7 Číslo článku 108242 Zdroj.dok. Geomorphology. - : Elsevier - ISSN 0169-555X
Roč. 408, 1 July (2022)Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova paleoearthquake ; speleotectonics ; speleoseismology ; karst caves ; active faults ; speleothems ; Eastern Alps Vědní obor RIV DB - Geologie a mineralogie Obor OECD Geology CEP GC22-24206J GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora USMH-B - RVO:67985891 UT WOS 000800209900002 EID SCOPUS 85127508865 DOI 10.1016/j.geomorph.2022.108242 Anotace Spectacular geomorphic evidence of recent tectonic activity and three potentially strong prehistoric earthquakes were discovered in Obir Caves in the Karawanken Mountains. This paper presents active fault structures, geomorphic features, and the age constraints attributed to particular seismotectonic events. The 1976 Mw 6.7 Friuli earthquake about 100 km from Obir Caves caused only local speleothem damage. The 100 km hypocentral distance enabled attenuation of the seismic waves so speleothem damage due to stalagmite resonance frequency was dampened. The documented dripstone column damage was rather caused by its sudden shortening due to passing elastic S-waves with estimated 3.5 (+8.2/−1.5) mm PGD amplitudes. At least three distinct seismotectonic events in the Late Pleistocene and Early to Middle Holocene were constrained by radiometric dating. The 40.6 cm sinistral fault slip occurred between 41.8 ± 1.3 ka and 18.7 ± 0.4 ka ago, the 2.6 cm dextral oblique reverse fault slip happened between 10.73 ± 0.23 and 8.61 ± 0.15 ka ago, and another speleothem damage event took place between 6.28 ± 0.24 ka and 5.7 ± 1.2 ka ago. These events were most probably accompanied by distinct destructive to very destructive paleoearthquakes with local intensities ranging from VIII to X on the ESI 2007 scale, significant rock weakening, and forming the large deep-seated gravitational slope deformation on the southeastern mountain slopes adjacent to Obir Caves. Pracoviště Ústav struktury a mechaniky hornin Kontakt Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0169555X22001350?via%3Dihub
Počet záznamů: 1