2010 - 2011 Public Lecture Series
at Pasadena City College

Please join our eleventh year of the Public Lecture Series!

Friday, November 19, 2010 at 6:00pm
The ARkStorm: Atmospheric Rivers in California
- Dr. Lucy Jones, USGS Pasadena

California's winter storms, fed by "atmospheric rivers" above the Pacific, rival hurricanes in their potential for rainfall and damage by flooding. In the winte r of 1861-1862, a series of storms caused such extensive flooding that one-third of the taxable land in California was considered destroyed. Come hear about the new understanding of these storms and the potential future impact to California .

Friday, April 29, 2011 at 7:00pm
Aftershocks, Foreshocks, and Multiplets: The Science and History of Earthquake Clustering
- Dr. Karen Felzer, USGS Pasadena

Earthquakes have a powerful ability to trigger other earthquakes, including earthquakes that are larger than themselves. Recent tragic examples include the February 22 Christchurch aftershock and the March 11 M 9.1 earthquake off of the North Coast of Honshu, Japan which was likely triggered by an M 7.2 foreshock that occurred two days earlier. Most earthquake triggering occurs to distances of 62-93 miles, and the largest earthquakes might trigger seismicity in vulnerable locations throughout the world. Likewise while most triggering occurs very quickly in time, aftershock sequences have been observed to last for decades and even centuries after the initial mainshock. Come learn about the probabilities of large earthquake triggering in our area and how it could affect you.