The DGS maintains its own network of seismometers to detect local earthquake activity. Following an earthquake swarm in 1972, the DGS established its first seismometer station in Newark. The network now consists of five seismic stations spread across the state: three stations in the Newark-Wilmington area, one at the DEMA office in southern New Castle County, and one at the Sussex County Emergency Operations Center. Signals are recorded on paper and captured digitally using Earthworm, a seismic processing system developed by the USGS. These records are shared nationally through participation in the Advanced National Seismic System Network, the Lamont-Doherty Cooperative Seismographic Network, the Northeast U.S. Seismic Network, and the Southeast U.S. Seismic Network. Small local earthquakes and larger earthquakes from other parts of the country and the world are clearly resolved by the network.

The seismic instruments located at the Greenville, DE location were adopted by DGS from the Earthscope Transportable Array, which consists of a network of 400 high-quality, portable broadband seismometers that are being placed in temporary sites across the United States. DGS adopted two of these Earthscope stations, P60A in Greenville, DE and Q61A in Milford, DE. This program provided an outstanding opportunity for Delaware to enhance its seismic monitoring capabilities in the future, and upgrade current antiquated equipment.

The equipment at this station was installed on 2013-04-28.

For more info, visit the station page at the Array Network Facility.

Instruments:

• Quanterra Q330 Datalogger
• Streckeisen STS-2 Broadband Seismometer
• Setra 278 Microbarometer
• NCPA Infrasound Microphone
• MEMS Barometric Pressure Gauge

Latitude: 39.8113
Longitude: -75.6358
Elevation: 110 meters (NAVD88)

The seismic instruments located at the Milford, DE location were adopted by DGS from the Earthscope Transportable Array, which consists of a network of 400 high-quality, portable broadband seismometers that are being placed in temporary sites across the United States. DGS adopted two of these Earthscope stations, P60A in Greenville, DE and Q61A in Milford, DE. This program provided an outstanding opportunity for Delaware to enhance its seismic monitoring capabilities in the future, and upgrade current antiquated equipment.

The equipment at this station was installed on 2013-05-28.

For more info, visit one of the following sites:

• Array Network Facility station page
• Earthscope Automated Receiver Survey (EARS) station page

Instruments:

• Quanterra Q330 Datalogger
• Nanometrics Trillium 240 v2 Broadband Seismometer
• Setra 278 Microbarometer
• NCPA Infrasound Microphone
• MEMS Barometric Pressure Gauge

Latitude: 38.8799
Longitude: -75.3256
Elevation: 10 meters (NAVD88)