IG reported that a M 4.7 earthquake was recorded at 1642 on 12 January at Fernandina and followed by a swarm of 29 local earthquakes all below M 3.1.
A new eruption began just before 1810 from a circumferential fissure located near the E edge of the caldera, at elevations around 1300-1400 m above sea level.
Several lava flows descended the E flank; Galapagos National Park rangers witnessed the eruption from the Bolívar Channel station.
A gas cloud rose 1.5-2 km above the fissure and drifted WNW.
A second peak in seismicity was recorded 30-40 minutes after the eruption onset and then gradually decreased.
Gas emissions decreased sometime after 2100 and thermal anomalies began to gradually diminish.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Fernandina (Ecuador)
