3 ms·
The linked study says 40x https://pubs.usgs.gov/of/2019/1048/ofr20191048.pdf https://pubs.usgs.gov/of/2019/1048/ofr20191048.pdf
by herlitzj 7y ago
The linked study says 40x
https://pubs.usgs.gov/of/2019/1048/ofr20191048.pdf https://pubs.usgs.gov/of/2019/1048/ofr20191048.pdf