john's blog

john's picture

Moderate Earthquake NE of Ottawa

A moderate earthquake originally estimated as having a magnitude M=5.0, but later downgraded to 4.8 and then 4.4, has struck NE of Ottawa, Canada.  It was felt over a wide range of eastern Canada and the northeastern part of the United States.  By our calculations, it struck in a region of low probability.

john's picture

More Comments on Data Issues ("Wonkish")

As discussed in previous posts, incomplete or unavailable data can seriously impact the quality of earthquake forecasts. In our case, these problems are associated with the Global Digital Seismic Network, funded and maintained by the US National Science Foundation, and the US Geological Survey, among others.  The data catalogs also contain contributions from local networks in various countries.

Pages

Subscribe to RSS - john's blog
Risk Alert