Characteristics of Repeating Long‐Period Seismic Events at Fuego Volcano, January 2012

Repeating seismic events in China.

About 10% of seismic events in and near China from 1985 to 2000 were repeating events not more than about 1 kilometer from each other. We cross-correlated seismograms from approximately 14,000 earthquakes and explosions and measured relative arrival times to approximately 0.01 second, enabling lateral location precision of about 100 to 300 meters. Such precision is important for seismic hazard ...

Dr. Nasser Maleki (January 25, 1953 – January 6, 2012)

Relative seismic velocity variations correlate with deformation at Kīlauea volcano

Seismic noise interferometry allows the continuous and real-time measurement of relative seismic velocity through a volcanic edifice. Because seismic velocity is sensitive to the pressurization state of the system, this method is an exciting new monitoring tool at active volcanoes. Despite the potential of this tool, no studies have yet comprehensively compared velocity to other geophysical obs...

Parallel System Architecture (PSA): An efficient approach for automatic recognition of volcano-seismic events

a r t i c l e i n f o Automatic recognition of volcano-seismic events is becoming one of the most demanded features in the early warning area at continuous monitoring facilities. While human-driven cataloguing is time-consuming and often an unreliable task, an appropriate machine framework allows expert technicians to focus only on result analysis and decision-making. This work presents an alte...

10 January 2012

In the early 1960s, Anthony Edwards and Luca Cavalli-Sforza made an effort to apply R.A. Fisher’s maximum likelihood (ML) method to estimate genealogical trees of human populations using gene frequency data. They used the Yule branching process to describe the probabilities of the trees and branching times and the Brownian motion process to model the drift of gene frequencies (after a suitable ...