3D spatial distribution of the seismic Gutenberg-Richter parameters (a and b values) in Long Valley Caldera

3D distribution of the <em>a</em> and <em>b</em> parameters of the Gutenberg-Richter (GR) law. The analysis is presented in Gola G., Barone A., Castaldo R., Chiodini G., D'Auria L., Garcia-Hernandez R., Pepe S., Solaro G. &amp; Tizzani P. "A novel multidisciplinary approach for the thermo-rheological study of volcanic areas: The case study of Long Valley Caldera", which has been submitted for possible publication in Journal of Geophysical Research - Solid Earth. For this purpose, we used a dataset consisting of more than 220,000 earthquakes from the NCEDC catalogue (NCEDC, 2014), spanning the interval 1978-2017 and located in the surroundings of Long Valley Caldera. We mapped the <em>a</em> and <em>b</em> values for a volume of 50×50×30 km³, over a grid of points having a regular spacing of 0.5 km. Coordinates: North America NAD27 UTM Zone 11N<br> Easting: 310000 - 350000 m.; Northing: 4150000 - 4185000 m