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Figure 1. Map of GSN stations color-coded by network operator.
Figure 2. Map of Next Generation System upgrade progress
Figure 3. GSN station coverage as represented through geographical density of stations. Contoured values show the number of stations within 20 degrees of each point on the map. Only GSN stations are used, which includes the IRIS/IDA and IRIS/USGS networks. Constructed 01/2015.
Figure 4. Map of GSN and FDSN stations by contributor.
Figure 5. GSN stations with other-than-seismic geophysical observation equipment. Color-coded by sensor type.
Figure 6. GSN stations contributing to the International Monitoring System (seismic) of the CTBTO.