To evaluate the effect of hydraulic fracturing in a low-permeability reservoir, propagation path tracing method for hydraulically created fractures was established based on microseismic monitoring data. First, numerical simulation wave process, grid search, and error-weight coefficient combined to locate source. Then, moment tensor inversion used determine tensile angle source mechanism fractur...

Developments in SQUID-based technology have enabled direct measurement of magnetic tensor data for geophysical exploration. For quantitative interpretation, we introduce 3D regularized inversion for magnetic tensor data. For mineral exploration-scale targets, our model studies show that magnetic tensor data have significantly improved resolution compared to magnetic vector data for the same mod...

[1] We carry out long‐period surface wave centroid moment tensor (CMT) inversions using various global tomographic models and two different forward modeling techniques for 32 large earthquakes previously studied using interferometric synthetic aperture radar (InSAR) data. Since InSAR methods provide an alternative and independent way of locating and characterizing shallow continental earthquake...

The Korea Meteorological Administration (KMA) provides detailed hypocenter information after the earthquake early warning (EEW) service, due to increased public interest and for study of fault movements. However, rapid production has limitations, including necessity calculation focal mechanisms, which requires expertise in seismology. Therefore, we developed automatic mechanisms (AFMs) based on...

A reference point equalization method has been developed which enables 'the separation of source and propagation effects of surface waves. The method works on seismic events located in a small source region, which allows us to assume that all events share the same path effects to a given receiver. Two important steps in the method are initialization and iteration. Initialization obtains the fir...