Is this the second earthquake swarm of 2018 at Yellowstone? There is at least something going on. Within 24 hours, more than 89 small quakes have hit a region situated 32 km east of Old Faithful Geyser in Wyoming and their number is increasing each hour now. The earthquakes are aligned forming a fissural dike next to Yellowstone Lake. This swarm seems to indicate an intrusion of magma inside the Caldera of the Park.
The earthquake swarm began on April 11, 2018 with approximately 25 earthquakes rattling 32km east of Old Faithful Geyser in Wyoming: