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- an example of the Jan Mayen Mw 6.8 of August 30, 2012 earthquake

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1 - an example of the Jan Mayen Mw 6.8 of August 30, 2012 earthquake
Small-aperture array translational and rotational seismograms from distant earthquakes - an example of the Jan Mayen Mw 6.8 of August 30, 2012 earthquake Jiří Málek1), Johana Brokešová2) and Petr Kolínský3) 1) Charles University, Faculty of Mathematics and Physics, Department of Geophysics, V Holešovičkách 2, , Prague, Czech Republic 2) Institute of Rock Structure and Mechanics, Academy of Science, Department of Seismology, V Holešovičkách 41, , Prague, Czech Republic 3) Department of Meteorology and Geophysics Faculty of Earth Sciences, Geography and Astronomy, University of Vienna Althanstrasse 14, 1090 Wien, Austria EGU 2015 General Assembly, 14 Apr 2015, Vienna

2 OUTLINE: 6DOF Rotaphone - basic principles - parameters
Small-aperture array translational and rotational seismograms from distant earthquakes OUTLINE: 6DOF Rotaphone - basic principles - parameters Records from anthropogenic sources - a quarry blast near Prague How to quantify the importance of rotation compared to translation (RTR) Records from microearthquakes - West Bohemia (Czech Republic), ML 2.3 - Gulf of Corinth (Greece), ML 1.9 - Provadia (Bulgaria), ML 1.6 Contamination of horizontal translations by tilt induced gravitational effects Conclusions EGU 2015 General Assembly, 14 Apr 2015, Vienna

3 Jana Mayen island earthquake – 2012-08-30 13:43:23.0 UTC
Small-aperture array translational and rotational seismograms from distant earthquakes Jana Mayen island earthquake – :43:23.0 UTC Mw 6.7 Small-aperture array Around the Příbram-Háje gas storage (Guralp CMG-40T, 30 s) ~ 2740 km fM < 0.1 Hz EGU 2015 General Assembly, 14 Apr 2015, Vienna

4 TRANSLATIONAL COMPONENTS [m/s]
Small-aperture array translational and rotational seismograms from distant earthquakes TRANSLATIONAL COMPONENTS [m/s] ROTATIONAL COMPONENTS at the Earth’s surface [rad/s] tilts torsion EGU 2015 General Assembly, 14 Apr 2015, Vienna

5 Array derived rotations (ADR)
Small-aperture array translational and rotational seismograms from distant earthquakes Array derived rotations (ADR) after Spudich et al., JGR, 1995 Basic assumption: uniform 1st-order spatial gradients over the whole array !!! EGU 2015 General Assembly, 14 Apr 2015, Vienna

6 EGU 2015 General Assembly, 14 Apr 2015, Vienna
Small-aperture array translational and rotational seismograms from distant earthquakes EGU 2015 General Assembly, 14 Apr 2015, Vienna

7 EGU 2015 General Assembly, 14 Apr 2015, Vienna
Small-aperture array translational and rotational seismograms from distant earthquakes EGU 2015 General Assembly, 14 Apr 2015, Vienna

8 EGU 2015 General Assembly, 14 Apr 2015, Vienna
Small-aperture array translational and rotational seismograms from distant earthquakes EGU 2015 General Assembly, 14 Apr 2015, Vienna

9 EGU 2015 General Assembly, 14 Apr 2015, Vienna
Small-aperture array translational and rotational seismograms from distant earthquakes EGU 2015 General Assembly, 14 Apr 2015, Vienna

10 EGU 2015 General Assembly, 14 Apr 2015, Vienna
Small-aperture array translational and rotational seismograms from distant earthquakes EGU 2015 General Assembly, 14 Apr 2015, Vienna

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