Intermediate-focus earthquakes are known to show features such as nondouble-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 10 N m. We determined frequency-dependent foc...

Seismic interferometry, also known as Green’s function retrieval by crosscorrelation, has a wide range of applications, ranging from surface-wave tomography using ambient noise, to creating virtual sources for improved reflection seismology. Despite its successful applications, the crosscorrelation approach also has its limitations. The main underlying assumptions are that the medium is lossles...

Intensive seismicity was often observed in the front of tabular stopes in South African gold mines. The seismicity was usually caused by high stress concentration due to excavation, and some of the seismic events were fault rupture events. This study focuses on numerical modelling of seismic wave propagation resulted from a moment magnitude Mw = 1.4 seismic even...

We assess the reliability of space-borne InSAR-derived deformation source parameters for volcanic and seismic events, with special focus on the future L-band data of the proposed Tandem-L mission [1-3]. Using representative simulation cases, the influence of certain characteristics of the InSAR measurements on the source model parameter precision is quantified. The performance drivers are asses...

Seismic source inversion is a non-linear problem in seismology where not just the earthquake parameters themselves but also estimates of their uncertainties are of great practical importance. Probabilistic source inversion (Bayesian inference) is very adapted to this challenge, provided that the parameter space can be chosen small enough to make Bayesian sampling computationally feasible. We pr...

In a stationary sensor situation, locating signals arriving from different directions can be achieved by using multiple sensors placed at different locations. Different methods for locating seismic signals using an array of seismometers have been examined. Matched field processing is a method for source localization whereby model fields are calculated and compared to measured data.

Seismic communication, through low-frequency and patterned substrate-borne vibrations that are generated by head thumping, and which travel long distances underground, is important in the nonvisual communication of subterranean mole rats of the Spalax ehrenbergi superspecies (2n = 52, 54, 58, and 60) in Israel. This importance pertains both intraspecifically in adaptation and interspecifically ...