20/03/2015. Villarica, Manam, Popocatepetl.

20/03/2015. Villarica, Manam, Popocatepetl.

Villarica, Chili :

Earthquake Activity:
Thirty-seven (37) earthquakes LP-type associated with fluid dynamics inside the volcano have been recorded with a local magnitude (ML) of 1.6 and a displacement (CD) of 8 cm2 , values that are small. The continuous tremor signal with a fluctuating behavior vise level considered low to moderate for this volcano, reaching a maximum of 21.4 cm2 DR. Pyroclastic materials located around the crater are still taken down to the lower slopes, mostly from the upper part of the volcano, as evidenced by the instrumental seismic signals recorded.


David Cortes | Agencia UNO

In the last 24 hours, the surface activity showed a similar trend compared to that reported yesterday, with periodic emission of pulsed gas and fine ash, seismically accompanied by a continuous tremor with a low to moderate energy, showing low seismic effectiveness of the current process, suggesting greater internal activity in a partially open system. This suggests that the volcanic system has entered a phase of greater instability could increase and eventually evolve rapidly towards an eruptive cycle similar to that which took place on March 3. The alert level remains at ORANGE, according to the protocol which means “probable eruption in the short term.” The restriction of an area of ??5 km around the active crater is recommended, both to prevent ballistic projections pyroclastic materials, lava flows and lahars (volcanic mudflows), outflow from the volcano to the west northwest, may have the ability to travel at speeds of 100 km / h.

Source : Sernageomin
Photo : David Cortes | Agencia UNO

Manam , Papouasie-Nouvelle-Guinée :

4,08 ° S, 145,037 ° E
Elevation 1807 m

RVO reported that activity at both Manam’s Southern Crater and Main Crater was low during 1-18 March although inclement weather made crater observations difficult; no noises were reported. Seismicity had slowly and erratically increased since 28 February, peaked on 13 March and remained at that level through 15 March, and then increased again through 18 March. The seismicity was characterized by small-to-moderate, sub-continuous, and continuous volcanic tremor. Discrete low-frequency earthquakes were also recorded.


The 10-km-wide island of Manam, lying 13 km off the northern coast of mainland Papua New Guinea, is one of the country’s most active volcanoes. Four large radial valleys extend from the unvegetated summit of the conical 1807-m-high basaltic-andesitic stratovolcano to its lower flanks. These “avalanche valleys” channel lava flows and pyroclastic avalanches that have sometimes reached the coast. Five small satellitic centers are located near the island’s shoreline on the northern, southern, and western sides.

Two summit craters are present; both are active, although most historical eruptions have originated from the southern crater, concentrating eruptive products during much of the past century into the SE valley. Frequent historical eruptions, typically of mild-to-moderate scale, have been recorded since 1616. Occasional larger eruptions have produced pyroclastic flows and lava flows that reached flat-lying coastal areas and entered the sea, sometimes impacting populated areas.

Source: Observatoire volcanologique de Rabaul (RVO), GVP.

Popocatepetl, Mexique :

March 19 11:00 am (1700 GMT March 19)
In the last 24 hours the Popocatepetl volcano monitoring system recorded 222 exhalations. The most important took place yesterday on 22:24 pm, today at 05:54 pm, 6:54 pm, 8:02 pm and 9:33 pm. Furthermore 13 events with seismic and acoustic characteristics have been classified as explosions occurred at 19:21 am and another at 10:59 pm. They were recorded with a height of the gas column from 1200 meters to the north northwest .In addition, were recorded during this period 23 minutes of low amplitude harmonic tremor .


A glow at night was observed on the crater.
Yesterday an afternoon fumarole steam and gas, with an approximate height of 600 meters towards the west-northwest was observed. Early in the morning, the volcano was observed with a constant fumaroles of steam and gas with an approximate height of 800 meters in a north-northwest direction.
At the time of this report, there is no visibility of the volcano, the wind direction is north-west to the north.

Photo : Erika Albisua

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