This dataset provides information about the number of properties, residents, and average property values for Casey Avenue cross streets in Spencer, WI.

September 2025

This dataset provides information about the number of properties, residents, and average property values for Triplett Road cross streets in Spencer, WV.

This cover contains station locations of the New Madrid Seismic Network within the study boundary. The network is a cooperative project of Saint Louis University and Memphis State University. Operation of the network has been continuous since June 1975, but operators have changed the network configuration throughout that time period. The start and stop dates in the point attribute file are not complete, but are included because they are useful for some of the stations.

Lines in this cover show where gravity oe aeromagnetic data have been modelled to constrain subsurface structure. Gravity and magnetic signatures result from deep structure, such as might be at hypocentral depths of earthquakes. We show only the lines for which interpretations or models are publically available. In gravmag_all, extent of the lines outside the study boundary is retained; in gravmag the lines have been clipped to the study boundary.

This cover includes seismic refraction lines that have geophysical cross sectional interpretations constraining subsurface structures that may penetrate to hypocentral depths. Lines were gathered from theses, dissertations, and publications.

This cover contains locations of two COCORP lines that cross the study area.

This cover contains the location of global positioning system stations that are located within the project boundary. Several GPS networks with various monument spacings are being used to monitor deformation in parts or all of the Mississippi embayment. One network is regional, and two of the network stations are located in western Kentucky within our map area.

Magnetotelluric soundings give data that can help define the l electricamagnetic properties of rocks, and with other geophysical data help define the structure of the shallow crust where earthquakes occur. The sounding points in this cover show where data was collected that was then modelled for deep structure (see reference).