TY - RPRT TI - Global statistical maps of extreme-event magnetic observatory 1 min first differences in horizontal intensity AU - Jeffrey J. Love AU - Pierdavide Coisson AU - Antti Pulkkinen PY - 2016 DO - 10.1002/2016gl068664 UR - https://pubs.usgs.gov/publication/70178804 ID - 70178804 ER -