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Volcanic Tremor and Low-Frequency Earthquakes in Iceland
1992Most earthquakes in Iceland are of the usual high-frequency type, reflecting brittle failure of the crust. Earthquakes lacking energy in the higher frequencies (low-frequency earthquakes) also occur, particularly in volcanic regions. Low-frequency earthquakes in the volcanic systems of Iceland span a broad spectrum with respect to amplitude/duration ...
Bryndís Brandsdóttir, Páll Einarsson
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Earth and Planetary Science Letters, 2013
Abstract The recent discovery of triggered tremors (TTs) and low-frequency earthquakes (LFEs) in various tectonic environments provides an opportunity for studying the fundamental properties and physical mechanisms of deep tectonic tremor. Here, we quantify the relationship between TTs and LFEs beneath the Central Range in southern Taiwan and their ...
Chi-Chia Tang +4 more
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Abstract The recent discovery of triggered tremors (TTs) and low-frequency earthquakes (LFEs) in various tectonic environments provides an opportunity for studying the fundamental properties and physical mechanisms of deep tectonic tremor. Here, we quantify the relationship between TTs and LFEs beneath the Central Range in southern Taiwan and their ...
Chi-Chia Tang +4 more
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Low-Frequency Properties of Intermediate-Focus Earthquakes
Bulletin of the Seismological Society of America, 2002Intermediate-focus earthquakes are known to show features such as non-double-couple focal mechanisms that indicate source complexities. To characterize these features, we have systematically studied the low-frequency radiation from 108 intermediate-focus earthquakes recorded by high-performance seismic networks from 1989–1997 whose total moment was > 3
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Models of tremor and low-frequency earthquake swarms on Montserrat
Journal of Volcanology and Geothermal Research, 2000Recent observations from Soufriere Hills volcano in Montserrat reveal a wide variety of low-frequency seismic signals. We discuss similarities and differences between hybrid earthquakes and long-period events, and their role in explosions and rockfall events.
J Neuberg, R Luckett, B Baptie, K Olsen
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Complexity of low-frequency earthquakes activity in western Shikoku
2020<p>Short-duration transient seismic events known as low-frequency earthquakes (LFEs) are a component of the slow earthquakes family observed in the transition zone, at the root of seismogenic regions of the subduction zones or active faults.
Natalia Poiata +4 more
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Earthquakes—A naturally occurring source of low‐frequency data
SEG Technical Program Expanded Abstracts 2011, 2011Seismic reflection data contain information at two very different length scales. The long wavelength or lowfrequency information is derived primarily from move-out velocity analysis and provides information on the order of kilometers (i.e., ~1 to 2 km).
Rebecca Saltzer +4 more
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Phase-Weighted Stacking Applied to Low-Frequency Earthquakes
Bulletin of the Seismological Society of America, 2014Abstract We apply phase‐weighted stacking (PWS) to the analysis of low‐frequency earthquakes (LFEs) in the Parkfield, California, region and central Cascadia. The technique uses the coherence of the instantaneous phase among the stacked signals to enhance the signal‐to‐noise ratio (SNR) of the stack.
C. H. Thurber +3 more
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A search for dilation in low frequency earthquake waveforms
The fault zone process that creates slow earthquakes remains unclear, but one proposed mechanism to limit slip speeds depends on shear-induced dilatancy and the resulting pore pressure changes.  This process would imply that the fault zone dilates during slow earthquakes.  So in this study, we search for the signature of dilation in ...Jessica Hawthorne +4 more
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Low-frequency earthquakes track the motion of a captured slab fragment
ScienceAccurate tectonic models are essential for assessing seismic hazard and fault interactions. However, the plate configuration at the complex Mendocino triple junction, where the San Andreas Fault and the Cascadia subduction zone meet, remains uncertain.
David R. Shelly +3 more
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Low-frequency earthquakes at the Torfajökull volcano, south Iceland
Journal of Volcanology and Geothermal Research, 2006Abstract Torfajokull is a large rhyolitic volcanic edifice with a 12-km-diameter caldera and abundant high-temperature geothermal activity. It is located in the neovolcanic zone in south Iceland, at the junction of the eastern rift zone and a transform zone with the intraplate volcanic flank zone of south Iceland.
Heidi Soosalu +2 more
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