We study the statistical properties of time distribution of seismicity in California by means of a new method of analysis, the diffusion entropy. We find that the distribution of time intervals between a large earthquake (the main shock of a given seismic sequence) and the next one does not obey Poisson statistics, as assumed by the current models. We prove that this distribution is an inverse ...

Temporal analyses were completed between the occurrence of intense displays of exotic luminous phenomena over a church in Zeitoun (Egypt) during the years 1968 through 1969 and regional seismicity. These phenomena, viewed by thousands of onlookers, began one year before an unprecedented increase (factor of 10) in seismic activity about 400 km to the southeast. Monthly analyses also demonstrated...

The systematic testing of intermediate-term earthquake prediction algorithms is faced with the difficulties of (1) the limited time spanned by instrumental catalogs of seismicity in most areas of the world, and (2) the relative arbitrariness of the selection of the region and time interval over which to apply the algorithm. We offer a systematic method which uses worldwide seismicity to compute...

A high-resolution relative earthquake location procedure is used to image the fine-scale seismicity structure of the northern Hayward fault, California. The seismicity defines a narrow, near-vertical fault zone containing horizontal alignments of hypocenters extending along the fault zone. The lineations persist over the 15-year observation interval, implying the localization of conditions on t...

I discuss thermal, rheological and compositional definitions of the Earth’s lithosphere and describe the data that can be brought to bear in refining these definitions. Models of the behaviour of the lithosphere are useful in describing such diverse effects as continental basin subsidence, the flexural response to imposed loads such as seamounts or sediment accumulations, the partial melting of...

Abstract Microseismic data acquired during hydraulic stimulations is routinely used to characterize fracture (HF) propagation away from a wellbore. When the include induced seismicity (IS) related fault slip, separating HF‐related and IS‐related events essential for HF treatment optimization IS mitigation. Linear non‐linear analytical diffusivity models can be interpret microseismic quantify of...

Different models have been proposed for the "drumbeat" earthquakes that accompanied recent eruptive behavior at Mount St. Helens. Debate continues as to whether seismicity is related to brittle failure during the extrusion of solid dacite spines or is the result of hydrothermal fluids interacting with a crack buried in the volcanic edifice. My model predictions of steady-state conduit flow conf...