The white plume and thermal signature (red box) of the new Fernandina eruption as seen from Terra's MODIS imager on September 4, 2017. NASA. News out of Ecuador is that Fernandina in the Galapagos Islands has erupted for the first time since 2009. Starting just after noon (local time) of September 4, the volcano produced new lava flows and a steam-and-gas plume that reached upwards of 4 kilometers (13,000 feet). Video of the eruption (see below) taken that evening show the strongly glowing summit area of the volcano and images show the lava flows working their way down the flanks of the volcano.
Volcán La Cumbre de isla Fernandina está en proceso de erupción. ► https://t.co/Mj6WR45Ilfpic.twitter.com/EhrA7YNiOO
— El Universo (@eluniversocom) September 5, 2017
The last eruption of Fernandina in 2009 was a fissure eruption
that sent lava flows down the slopes of the shield volcano and imperiled some of the rare wildlife
of the Galapagos Islands. The island itself is uninhabited, so the hazards are really to the animals living on the island. Rarely do eruptions from Fernandina become explosive, but geologists from the Instituto Geofísico
said that small explosions are not out of the question. The most recent eruptions at Fernandina lasted a few weeks. The last eruption in the Galapagos Islands was from Wolf
in 2015. That eruption
last almost 2 months as ranked as a VEI 4
. Note: Interestingly, an M4.6 earthquake occurred between Fernandina and Isabelle
on September 2, just to the south of Fernandina. The depth was ~10 kilometers, which wouldn't be unreasonable for magma moving from its mantle source under the Galapagos into the oceanic crust. Now, this isn't causation, but definitely an interesting correlation.