A mild (2.3) earthquake was reported by the USGS at 11:34 pm on December 20 (or in UTC time, December 21 at 4:34 am) and was felt by people in the White River Junction area. Although earthquakes are not common in Vermont, people should be prepared to drop, cover and hold on during a seismic event. View the report at the USGS.
PLAN - MAP - TEST - PROTECT
Photograph (J. Kim): Orbicular granite, Craftsbury
The Geological Survey focused on collecting water well temperature data as an indicator of temperature gradients, radionuclide chemistry as a potential natural augmentation to heat production, thermal conductivity measurements which impact heat flow, and structural data particularly rock anisotropy and fracture data. Thermal conductivity and geochemical data for 40 rock samples plus 17 water well temperature records were uploaded to the National Geothermal Data System for easy access.
Photograph (T. Eliassen): Anticline and syncline, Bennington
The publications of the Geological Survey are available on-line and include a variety of maps and text from statewide to local scales, general interest to technical reports, and associated GIS data (shapefiles and geodatabases). As a service, we also host publications of the Vermont Geological Society and many USGS maps which were compiled for the 2011 Bedrock Geologic Map of Vermont. The full list of publications is in the left navigation bar.
The mapping program produces bedrock and surficial geologic maps by town, quadrangle and watershed. It is funded through STATEMAP, an annual competitive grant process through the National Cooperative Geologic Mapping Program of the U.S.Geological Survey. The State Mapping Advisory Committee, comprised of legislators, consultants, geologists, and mineral industry personnel, meets with the State Geologist to review the map program and make recommendations concerning the goals of this project.