Volcanic activity world-wide 15-16 August: El Hierro, Popocatépetl, Fuego, Santiaguito, Nevado del Ruiz, Galeras, Tungurahua, White Island, Tongariro
Thursday Aug 16, 2012 11:32 AM | DOOR: T
There has not been much change in volcano activity worldwide, and as we're on tour, our reports will be less frequent until next week.
A new earthquake swarm has started yesterday at El Hierro volcano. It is located at about 10 km depth, i.e. only half the depth of previous swarms, and just north off the western El Golfo coast. So far, more than 50 (mostly very small around magnitude 1) quakes have been registered since yesterday. A small increase in tremor is visible as well.
Activity remains weak at Popocatépetl in Mexico. The frequency of explosions has again decreased (once every 2-3 hours), but a series of small volcano tectonic earthquakes and phases of high-frequency tremor has been recorded since the evening of 14 Aug under the volcano.
Fuego volcano has occasional strombolian explosions ejecting incandescent blocks to about 100 m and producing ash plumes of 100-400 m height. The lava flow is reported to be 250 m long in the latest update from the volcano observatory.
Santiaguito / Santa Maria (Guatemala) has had a small decrease in activity, with less frequent explosions and the lava flows also appearing to be less active.
Strong unrest at Nevado del Ruiz (Colombia) continues, with ongoing tremor, shallow quakes, and strong steam emissions sometimes containing ash.
Tungurahua volcano at the moment is the most active volcano on the continent. It continues to produce loud explosions and moderately strong ash venting which cause ashfall on surrounding communities. Tremor is high and seems to be rising. Ash is rising to an elevation of 20,000 ft (6 km) and a SO2 plume is visible drifting west from the volcano.
Galeras volcano has pulses of volcanic tremor and small earthquakes.
In new Zealand, volcanic activity is subsiding again. Activity has further decreased at White Island. Volcanic and seismic activity at White Island have remained low and onl a minor steam plume is visible with no apparent ash.
Tongariro volcano has stayed calm as well with no new significant activity.
Volcanic activity world-wide 14 August: Tungurahua, Etna, Long Valley, Popocatépetl, Fuego, Santiaguito, Pacaya, Nevado del Ruiz, Sotará, Bagana, Batu Tara, Sakurajima
Tuesday, Aug 14, 2012
Volcanic activity world-wide 13 Aug 2012: new activity at Tofua (Tonga Islands), Popocatépetl, Fuego, Santiaguito, Costa Rica, Nevado del Ruiz, Reventador, Tungurahua, Sakurajima, Tongariro, White Island
Monday, Aug 13, 2012
Volcanic activity world-wide 12 Aug 2012: Etna, Stromboli, Katla, Popocatépetl, Fuego, Santiaguito, Nevado del Ruiz, Reventador, Tungurahua, Sakurajima, Ambrym, White Island
Sunday, Aug 12, 2012
Etna volcano (Italy): The tremor signal has stayed calm, but weak strombolian activity or spattering from the vent inside the Bocca Nuova is probably continuing. Interestingly, a few relatively large quakes (around M3) have occurred on the NE flank near (or on?) the Pernicana fault this morning and it will be interesting to monitor the NE rift zone in the coming months. ... [meer...]
Volcanic activity world-wide 11 Aug 2012: Kermandec Islands, White Island, Etna, Stromboli, Popocatépetl, Fuego, Tungurahua, Sakurajima, Nyiragongo, Kamchatka
Saturday, Aug 11, 2012
New Zealand continues to dominate the volcanic news. ... [meer...]
Volcanic activity world-wide 10 Aug 2012: Tongariro, White Island, Askja, Etna, Stromboli, Santorini, Popocatépetl, Nevado del Ruiz, Tungurahua, Sakurajima
Friday, Aug 10, 2012