Historical Seismicity of the Rijeka Region (Northwest External Dinarides, Croatia)—Part II: The Klana Earthquakes of 1870

Abstract

Research Article| May 30, 2018 Historical Seismicity of the Rijeka Region (Northwest External Dinarides, Croatia)—Part II: The Klana Earthquakes of 1870 Marijan Herak; Marijan Herak aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Search for other works by this author on: GSW Google Scholar Mladen Živčić; Mladen Živčić bSlovenian Environment Agency, Vojkova 1b, 1000 Ljubljana, Slovenia Search for other works by this author on: GSW Google Scholar Ivica Sović; Ivica Sović aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Search for other works by this author on: GSW Google Scholar Ina Cecić; Ina Cecić bSlovenian Environment Agency, Vojkova 1b, 1000 Ljubljana, Slovenia Search for other works by this author on: GSW Google Scholar Iva Dasović; Iva Dasović aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Search for other works by this author on: GSW Google Scholar Josip Stipčević; Josip Stipčević aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Search for other works by this author on: GSW Google Scholar Davorka Herak Davorka Herak aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Search for other works by this author on: GSW Google Scholar Author and Article Information Marijan Herak aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Mladen Živčić bSlovenian Environment Agency, Vojkova 1b, 1000 Ljubljana, Slovenia Ivica Sović aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Ina Cecić bSlovenian Environment Agency, Vojkova 1b, 1000 Ljubljana, Slovenia Iva Dasović aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Josip Stipčević aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Davorka Herak aDepartment of Geophysics, Faculty of Science, University of Zagreb, Horvatovac 95, 10000 Zagreb, Croatia, [e-mail] Publisher: Seismological Society of America First Online: 30 May 2018 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2018) 89 (4): 1524–1536. https://doi.org/10.1785/0220180064 Article history First Online: 30 May 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Marijan Herak, Mladen Živčić, Ivica Sović, Ina Cecić, Iva Dasović, Josip Stipčević, Davorka Herak; Historical Seismicity of the Rijeka Region (Northwest External Dinarides, Croatia)—Part II: The Klana Earthquakes of 1870. Seismological Research Letters 2018;; 89 (4): 1524–1536. doi: https://doi.org/10.1785/0220180064 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT The Klana earthquake sequence with the mainshock on 1 March 1870 (⁠Imax=VIII Medvedev–Sponheuer–Karnik [MSK]) is one of the most important events that occurred in the Rijeka (Croatia) epicentral region. It is remarkable not just because of its impact to the local community and its significance for the seismic hazard in the Rijeka area but also because it provided some of important observations on earthquake phenomena during the infancy of seismology. In particular, Stur (1871) seems to have been the first to attempt to explain the observed variation in damage by interaction of different local geological units during shaking; Hoernes (1878) heavily relied on Stur's data from the Klana epicentral region when he proposed that the vast majority of global earthquakes is related to the mountain‐building process and thus named them tectonic earthquakes. Despite this, the Klana earthquake so far has escaped any detailed consideration by seismologists. In this study, we present the historical data sources consulted to extract useful reports on damage and other observed effects, compile macroseismic maps for the five strongest events, and invert the estimated intensity data to compute macroseismic hypocenters and epicentral intensities for the mainshock and the two strongest aftershocks. We also present an earthquake chronicle with data for 92 identified earthquakes in the area for the January–August 1870 period. The mainshock's macroseismic epicenter is located near the active Raša fault–Klana‐Novi Vinodolski fault system, which we thus propose to be the primary source of the sequence. Macroseismic epicenters of the aftershocks lie close to the surface trace of the nearby Skadanščina‐Rijeka reverse fault. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.