Complex and Segmented Rupture Associated with the 14 August 2003 Mw 6.2 Lefkada, Ionian Islands, Earthquake

Benetatos, Christoforos; Dreger, Douglas S.; Kiratzi, Anastasia

doi:10.1785/0120060123

Cited by 33 publications

(33 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Slip models for the 2003 event indicated that it ruptured two distinct subevents that were 40 km apart with 14 s time difference between the rupture of the two slip patches [Zahradnik et al, 2005;Benetatos et al, 2007]. Slip models for the 2003 event indicated that it ruptured two distinct subevents that were 40 km apart with 14 s time difference between the rupture of the two slip patches [Zahradnik et al, 2005;Benetatos et al, 2007].…”

Section: Discussionmentioning

confidence: 99%

“…We used floating point LC estimates and the Melbourne-Wubbena wide lane to resolve ambiguities to integer values with the assistance of a Kalman smoothing filter. We also processed data from the Benetatos et al, 2007]. Station NOA1 in Athens was set as a fixed reference station, because as a part of the EUREF Geophysical Research Letters 10.1002/2016GL069764 Permanent Network (EPN) ensures high data quality, while it is far enough to guarantee no influence by the earthquake shaking.…”

Section: Gps Datamentioning

confidence: 99%

“…Station NOA1 in Athens was set as a fixed reference station, because as a part of the EUREF Geophysical Research Letters 10.1002/2016GL069764 Permanent Network (EPN) ensures high data quality, while it is far enough to guarantee no influence by the earthquake shaking. Grey beach balls and small white stars show focal mechanisms and locations of the two subevents of the 2003 earthquake [from Benetatos et al, 2007]. We also processed data from the Benetatos et al, 2007].…”

Section: Gps Datamentioning

confidence: 99%

See 2 more Smart Citations

Slip model of the 17 November 2015 M_w = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Chousianitis

Konca

Tselentis

et al. 2016

Geophysical Research Letters

View full text Add to dashboard Cite

We inferred the rupture process of the 2015 Lefkada earthquake by combining teleseismic and near‐field strong motion data, together with static and dynamic GPS displacements. The joint inversion of all data sets revealed a relatively complex slip pattern with a heterogeneous distribution. Slip is confined in the upper 10 km. Two principal asperities with peak slip amplitude of 2.35 m, which released 65% of the total seismic moment, were recovered southwest of the epicenter. Remarkably, the 2015 earthquake ruptured the part of the Cephalonia Transform Fault Zone that remained unbroken during the 2003 event, revealing a pattern of rupture segmentation along the fault zone. In this context the Lefkada segment can be divided into a northern and southern part. Preseismic deformation onshore southern Lefkada revealed that since the 2003 rupture, the northern part of the Lefkada segment continuously loaded the southern part, which eventually broke during the 2015 event.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Gps Datamentioning

confidence: 99%

Section: Gps Datamentioning

confidence: 99%

See 1 more Smart Citation

Slip model of the 17 November 2015 M_w = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Chousianitis

Konca

Tselentis

et al. 2016

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…The largest of them are the M = 7.2 event of 12 August 1953, in Cephalonia ; the 1867, M = 7.2, in Lixouri (Cephalonia Island); and the M = 7.0 transpressive event of 17 January 1983, that occurred on the southwestern part of the Cephalonia Fault source (Louvari et al, 1999). Other significant earthquakes of the instrumental era are the M = 6.4 strike-slip earthquake that occurred on 8 June 2008, on the Achaia Fault source Feng et al, 2010), and two events with M = 6.5 and with M = 6.2 that occurred on the southern part of the Lefkada Fault source, respectively on 22 April 1948 and on 14 August 2003 Benetatos et al, 2007). The earthquakes of 1948 and 1983 also generated tsunamis (NGDC/WDS Global Historical Tsunami Database; Ambraseys and Synolakis, 2010).…”

Section: Crustal Fault Sources (Type 1): Ionian Island Transform Faulmentioning

confidence: 99%

Integrating geologic fault data into tsunami hazard studies

Basili

Tiberti

Kastelic

et al. 2013

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

We present the realization of a fault-source data set designed to become the starting point in regional-scale tsunami hazard studies. Our approach focuses on the parametric fault characterization in terms of geometry, kinematics, and assessment of activity rates, and includes a systematic classification in six justification levels of epistemic uncertainty related with the existence and behaviour of fault sources. We set up a case study in the central Mediterranean Sea, an area at the intersection of the European, African, and Aegean plates, characterized by a complex and debated tectonic structure and where several tsunamis occurred in the past. Using tsunami scenarios of maximum wave height due to crustal earthquakes (M_w=7) and subduction earthquakes (M_w=7 and M_w=8), we illustrate first-order consequences of critical choices in addressing the seismogenic and tsunamigenic potentials of fault sources. Although tsunamis generated by M_w=8 earthquakes predictably affect the entire basin, the impact of tsunamis generated by M_w=7 earthquakes on either crustal or subduction fault sources can still be strong at many locales. Such scenarios show how the relative location/orientation of faults with respect to target coastlines coupled with bathymetric features suggest avoiding the preselection of fault sources without addressing their possible impact onto hazard analysis results

show abstract

“…The 14 August 2003 (M w 6.2) Lefkada earthquake changed this velocity deficit, introducing a maximum coseismic slip of 34 cm (Benetatos et al, 2007) at the western part of the Ionian block. This is likely to have caused the accumulation of some deformation at the rigid inner part of the block that was probably diffused by distributed minor faulting, as suggested by analog models of rotating blocks (Goldsworthy et al, 2002).…”

Section: Seismotectonic Interpretationmentioning

confidence: 99%

Rupture Process and Aftershocks Relocation of the 8 June 2008 Mw 6.4 Earthquake in Northwest Peloponnese, Western Greece

Konstantinou¹,

Melis²,

Lee³

et al. 2009

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

On 8 June 2008 at 12:25 (GMT) an M w 6.4 strong earthquake occurred in the area of northwest Peloponnese, western Greece, causing the death of two people and extensive damage to the surrounding area. The main event and its aftershocks were recorded by one nationwide and three regional networks equipped with threecomponent broadband seismometers. Initial locations of the earthquake sequence comprising 438 aftershocks showed a linear northeast-southwest trend and that the mainshock was located at 22 km depth. After the relocation using catalog and differential travel times, most events form three distinct clusters at depths 15-25 km. Moment tensor solutions for the main event and its largest aftershocks exhibited a pure strike-slip mechanism with one nodal plane orientated northeast-southwest in accordance with the relocated seismicity. A parallel, nonnegative least-squares inversion technique utilizing multiple-time windows was used to derive the spatiotemporal slip distribution of the main event. The resulting slip distribution model revealed a large slip patch (maximum slip ∼150 cm) between 10 and 20 km depth at the northeast part of the fault that also coincides with the area that suffered most of the damage. Another patch exhibiting smaller amounts of slip (20-50 cm) is located to the southwest direction at the same depth range, and smaller patches exist at 25-30 km depth. Most aftershocks are located in areas of low slip (< 25 cm) filling the regions of slip deficit. The 8 June earthquake occurred at an area where no previous seismological or other observations indicated the existence of a seismogenic fault at that depth and with this strike. This, and the fact that the event nucleated in the middle to lower crust, may be interpreted as the reactivation of a fault structure that was inherited from previous tectonic phases.Online Material: Spatiotemporal evolution of the aftershock sequence of the 8 June 2008 mainshock, sensitivity tests to the mainshock slip inversion, color versions of figures, relocated aftershocks catalog, classification scheme for the moment tensor solutions, and moment tensor inversion description.

show abstract

Complex and Segmented Rupture Associated with the 14 August 2003 Mw 6.2 Lefkada, Ionian Islands, Earthquake

Cited by 33 publications

References 33 publications

Slip model of the 17 November 2015 M_w = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Slip model of the 17 November 2015 M_w = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Integrating geologic fault data into tsunami hazard studies

Rupture Process and Aftershocks Relocation of the 8 June 2008 Mw 6.4 Earthquake in Northwest Peloponnese, Western Greece

Contact Info

Product

Resources

About

Complex and Segmented Rupture Associated with the 14 August 2003 Mw 6.2 Lefkada, Ionian Islands, Earthquake

Cited by 33 publications

References 33 publications

Slip model of the 17 November 2015 Mw = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Slip model of the 17 November 2015 Mw = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Integrating geologic fault data into tsunami hazard studies

Rupture Process and Aftershocks Relocation of the 8 June 2008 Mw 6.4 Earthquake in Northwest Peloponnese, Western Greece

Contact Info

Product

Resources

About

Slip model of the 17 November 2015 M_w = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data

Slip model of the 17 November 2015 M_w = 6.5 Lefkada earthquake from the joint inversion of geodetic and seismic data