The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
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Actividad volcánica 27 en todo el mundo puede 2013: Popocatépetl, Gamkonora, Pavlov, Telica, Sabancaya
lunes may 27, 2013 15:05 |
Seismic recording from Telica this morning (TELN station, INETER)
The crater of Sabancaya volcano on 21 May 2013 (IGP)
Gamkonora (Halmahera): terremoto mayor actividad ha emitido una alerta de erupción por VSI, quien planteó la situación del volcán a 3 ("Siaga", "ADVERTENCIA") de 4 esta mañana. Vulcanólogos indonesias informaron que la desgasificación pluma desde el cráter de la Cumbre del volcán ha vuelto oscura, que sugiere la presencia de ceniza (probablemente freática en origen) desde el 25 de mayo.
La sismicidad ha mostrado cambios significativos con la aparición de tremor armónico, tipo-terremotos de baja frecuencia "tornillo" (se sabe del volcán Galeras en Colombia que preceden a menudo explosiones). Volcánica tectónica terremotos (VA-tipo) relacionados con fracturamiento de roca han aumentado mucho, sugiriendo magma en profundidad es entrometerse en diques nuevas.
No ash plumes have been detected on satellite images. The last activity of Gamkonora goes back to January, when it produced some small phreatic explosions.Pavlov (Alaska Peninsula, USA): The eruption continues at low levels (both as surface lava emission and seismic activity). AVO mentions that "during past eruptions of Pavlof, the style of eruptive activity fluctuated from higher to lower levels. Therefore, this apparent lower-level activity does not necessarily indicate that the eruption is ending. Although the activity to date has been characterized by relatively low-energy lava fountaining and ash emission, more energetic explosions could occur without warning that could place ash clouds above 20,000 ft. ... [read more]... [show less] "Depending on wind direction and strength, trace to minor ash fall may occur on local communities downwind. Information about mitigating the effects of volcanic ash can be found on the AVO web page.
Popocatépetl (Central Mexico): The volcano's activity has been reduced compared to a week ago, but still produces occasional explosions with plumes of up to 2 km in height, and many smaller emissions, accompanied by low-level harmonic tremor and a continuous steam plume rising about 1 km. The Volcanic Alert Level remains at Yellow, Phase 3, and an exclusion zone of 12 km radius around the summit is in place.
Telica (Nicaragua): Seismic activity is on the increase again since about 24 May, but still far from the earthquake swarm earlier this year.
Sabancaya (Peru): The volcano has remained quiet, but is still showing signs of unrest. IGP scientists found evidence of eruptive activity (no fresh lava or pyroclastic deposits) inside the crater of of the volcano during a helicopter survey on 21 May. Only steaming and degassing were observed from the crater, that measures about 300-350 m in diameter and is 200 m deep. 2 major fumarolic areas are present in the N and SW sectors of the crater floor. Seismic activity is currently calm (as of 27 May), but occasional earthquake swarms still occur (such as on 21 May). Overall, a rise of volcano-tectonic quakes, likely related to new magma intrusions at depth, have been on the rise since early May.
Etna (Sicily, Italy): Etna today is free of clouds, but strong winds with gusts up to 70 km/h speed prevail. No further significant earthquakes occurred. The only activity remains degassing, and occasional small explosions, not visible, deep inside Bocca Nuova, based on seismic observations (OPEC). ...
Chirinkotan (Northern Kuriles): The remote volcano in the northern Kuriles is probably in eruption, the latest SVERT report and satellite images suggest. A plume of gas and steam, and possibly some minor amounts ash was seen with the MODIS sensor onboard the NASA Terra satellite this morning. ...
Stromboli (Eolian Islands, Italy): Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ...
Volcano Tours on Hawai'i: The Hawaiian Islands are not only home to the most active volcanoes in the world, Kilauea and Mauna Loa on the Big Island, but also boast a unique natural environment. Born by volcanic activity of a very active hot spot in the middle of the Pacific Plate, they are a showcase of natural history.
Volcano Calendar 2019: We're proud to present our 2019 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.
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