February 26, 1999 2:04 p.m.

Mainers Shake from Largest Earthquake in 10 Years

Internet On-line Survey Will Record the Event

AUGUSTA, Maine - State Geologist Robert Marvinney reports that the February 25 earthquake was Maine's largest earthquake within the last 10 years. The earthquake registered 3.8 on the Richter Scale and occurred at 10:38 p.m. EST about 2 miles east of Waterville. "The February 25 earthquake was the largest in 10 years and the third largest since modern instruments have been recording earthquakes in Maine," said Marvinney.

The Department of Conservation's Maine Geological Survey has posted an on-line survey on their Internet site to record the event. Mainers who experienced yesterday's earthquake can tell their experience by filling out the "Earthquake Questionnaire" that was developed in cooperation with the US Geological Survey. Residents are asked about specific information such as the type of soil and building construction, and the sorts of noises and movements that were felt during the quake. The site is located at the State of Maine home page, www.maine.gov under "Earthquake News and Questionnaire."

Residents without Internet access can call or write for the form. Contact the Maine Geological Survey Monday through Friday by phone at (207) 287-2801 or through mail:

Maine Geological Survey/Department of Conservation
22 State House Station
Augusta, ME 04333-0022
e-mail at mgs@maine.gov

"It is important to collect personal observations from many people as soon as possible in order to establish the size of the area affected, and the various types of effects people felt in different areas," remarked State Geologist Marvinney. "This information helps seismologists understand the way that seismic waves travel through the bedrock crust of Maine." Marvinney added that he felt the quake from his residence in Readfield and has already fill out the form describing his experience.

The Geological Survey asked residents to record their experience when a 5.1 earthquake centered in Quebec City shook residents throughout the state on November 5, 1997. "More than 200 people replied to the survey and that information has greatly enhanced our knowledge of the effects," replied Geologist Marvinney.

Modern seismographs have been monitoring Maine earthquakes only since the 1970s, and having similar first-hand reports for this earthquake will help to estimate the sizes and locations of historical earthquakes that occurred before modern equipment was available.

Last updated on October 6, 2005