Periods of volcano-tectonic earthquakes slowly transformed into continuous tremor with distinct bursts of high-frequency signals marking discrete volcano-tectonic events during 0430-0500 on 1 October. During this time a new vent opened in a deep valley on the SSW flank at 700 m elevation.
The eruption was described as a distinct incandescent glow formed from ejecting material rising less than 100 m above the vent. By dawn light-gray ash plumes were visible rising several hundred meters and drifting NW. Lava fountaining continued throughout the day, and gray ash plumes rose several kilometers above the vent and drifted W. RVO recommended that the Alert Level be raised to Stage 3. [meno]

At 05:40 local time on 30 September a five-minute-long phreatic eruption ejected sediment, and produced a plume that rose 2 km above the crater rim and drifted SW. Ashfall and a sulfur odor was reported in Trojas de Sarchi and Grecia. Officials closed the PNVP because of the eruption and ongoing elevated seismicity; the park remained closed the next day.
Source: Smithsonian / USGS Weekly Volcanic Activity Report 25 September-1 October 2019 [meno]

SERNAGEOMIN raised the Alert Level to Orange (second highest level on a four-color scale) and ONEMI updated the Yellow Alert (the middle level on a three-color scale) for residents, noting a restriction for entering a 5-km radius from El Agrio Crater. The seismic network recorded a local M 3.1 VT earthquake at 2340 on 30 September, and a local M 3.7 VT event at 0628 on 1 October. The report also noted that 14 lower-energy events (largest was M 2.4) were recorded.
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The full report is as follows:
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FVFE01 at 06:03 UTC, 03/10/19 from RJTD [meno]

The full report is as follows:
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FVXX21 at 04:56 UTC, 03/10/19 from KNES [meno]

The full report is as follows:
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FVAK21 at 04:30 UTC, 03/10/19 from PAWU [meno]

The full report is as follows:
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Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 . ...più [leggere tutti]

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 23000 ft (7000 m) altitude or flight level 230 . ...più [leggere tutti]

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 10000 ft (3000 m) altitude or flight level 100 . ...più [leggere tutti]

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 17000 ft (5200 m) altitude or flight level 170 . ...più [leggere tutti]

Stromboli (Eolian Islands, Italy): (2 Oct) The activity at the volcano continues to be elevated overall, but has been decreasing slowly during the past weeks. ...più [leggere tutti]

Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...più [leggere tutti]

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 . ...più [leggere tutti]

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Anchorage warned about a volcanic ash plume that rose up to estimated 31000 ft (9400 m) altitude or flight level 310 and is moving at 40 kts in E direction. ...più [leggere tutti]

Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ...più [leggere tutti]

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 and is moving at 15 kts in S direction. ...più [leggere tutti]

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