Pinatubo volcano (Luzon, Philippines) - Smithsonian / USGS Weekly Volcanic Activity Report for 21 September-27 September 2022 (Continuing Activity)
Wednesday, Sep 28, 2022 | 3 years ago · VN
On 25 September PHIVOLCS warned of potential lahars around Pinatubo due to intense rains from a typhoon expected during 25-26 September. Significant deposits from 1991 pyroclastic density currents on …On 25 September PHIVOLCS warned of potential lahars around Pinatubo due to intense rains from a typhoon expected during 25-26 September. Significant deposits from 1991 pyroclastic density currents on the W flank may be remobilized, generating lahars down major drainages in that watershed. PHIVOLCS noted that the communities of San Marcelino, San Narciso, San Felipe, and Botolan, Zambales Province,…Open article
Pinatubo volcano (Luzon, Philippines) - Smithsonian / USGS Weekly Volcanic Activity Report for 21 September-27 September 2022 (Continuing Activity)
Thursday, Sep 22, 2022 | 3 years ago · VN
On 25 September PHIVOLCS warned of potential lahars around Pinatubo due to intense rains from a typhoon expected during 25-26 September. Significant deposits from 1991 pyroclastic density currents on …On 25 September PHIVOLCS warned of potential lahars around Pinatubo due to intense rains from a typhoon expected during 25-26 September. Significant deposits from 1991 pyroclastic density currents on the W flank may be remobilized, generating lahars down major drainages in that watershed. PHIVOLCS noted that the communities of San Marcelino, San Narciso, San Felipe, and Botolan, Zambales Province,…Open article
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Pinatubo (Philippines) - Report for 24 November-30 November 2021 - NEW
Wednesday, Dec 1, 2021 | 3 years ago · VN
PHIVOLCS reported that a weak phreatic explosion at Pinatubo was recorded during 1209-1213 on 30 November. The event was likely drive by shallow hydrothermal processes based on very low seismicity recorded during the previous few days, low diffuse carbon dioxide flux from the lake, and a notable inf…Open article
Pinatubo volcano (Philippines): large explosive eruption reported, ash to 44,000 ft
Tuesday, Nov 30, 2021 | 3 years ago · T
Update: PHIVOLCS confirmed a phreatic explosion took place at the volcano today from 12.09-12.13 p.m. local time. The explosion did not involve new magma, but was a result of overheated fluids of the shallow hydrothermal system. It generated a tall plume consisting mostly of steam and only little as…Update: PHIVOLCS confirmed a phreatic explosion took place at the volcano today from 12.09-12.13 p.m. local time. The explosion did not involve new magma, but was a result of overheated fluids of the shallow hydrothermal system. It generated a tall plume consisting mostly of steam and only little ash:
An explosive eruption was reported from th…Open article
IP Camera snapshot from VPBO station in Villar, Botolan, Zambales, 12 kilometers northwest of Pinatubo Crater, of the steam-dominated whitish top of the eruption plume that rose above the cloud cover over the edifice a few minutes after the end of phreatic eruption at 12:13PM. pic.twitter.com/TKk05fBwJb
— PHIVOLCS-DOST (@phivolcs_dost) November 30, 2021
An explosive eruption was reported from th…Open article
Pinatubo volcano (Luzon, Philippines) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 November-30 November 2021 (New Activity / Unrest)
Wednesday, Nov 24, 2021 | 4 years ago · VN
PHIVOLCS reported that a weak phreatic explosion at Pinatubo was recorded during 1209-1213 on 30 November. The event was likely drive by shallow hydrothermal processes based on very low seismicity recorded during the previous few days, low diffuse carbon dioxide flux from the lake, and a notable inf…PHIVOLCS reported that a weak phreatic explosion at Pinatubo was recorded during 1209-1213 on 30 November. The event was likely drive by shallow hydrothermal processes based on very low seismicity recorded during the previous few days, low diffuse carbon dioxide flux from the lake, and a notable infrasound signal. A plume mostly comprised of steam was seen rising above weather clouds within a few minutes of the end of the event.
The Tokyo VAAC stated that the plume rose to 13.4 km (44,000 ft) a.s.l. and drifted W based on satellite data.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Tokyo Volcanic Ash Advisory Center (VAAC)
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From: Global Volcanism Program, 2021. Repo…Open article
The Tokyo VAAC stated that the plume rose to 13.4 km (44,000 ft) a.s.l. and drifted W based on satellite data.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Tokyo Volcanic Ash Advisory Center (VAAC)
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From: Global Volcanism Program, 2021. Repo…Open article
Pinatubo volcano (Luzon Island, Philippines) activity update: Volcanic earthquakes continuous at Pinatubo Volcano
Monday, Mar 15, 2021 | 4 years ago · RL
Pinatubo Volcano increase in seismic activity, no imminent eruption foreseen
Monday, Mar 8, 2021 | 4 years ago · RL
Since its alert level increase from 0 to 1 last 4 March 2021, Pinatubo Volcano had only experienced about 1 to 9 daily volcanic quakes. According to the latest volcano bulletin issued by PHIVOLCS today, 8 March 2021, there has been an increase in number of volcanic quakes recorded. In the last 24 ho…Open article
Pinatubo volcano (Luzon Island, Philippines): Volcanic Alert Level raised to Yellow
Thursday, Mar 4, 2021 | 4 years ago · RL
The alert level for Mt. Pinatubo was raised today, 04 March 2021, from level 0 (quiet) to level 1 (low unrest). Since 20 Jan. 2021, a total of 1722 imperceptible quakes have been recorded by PHIVOLCS' Pinatubo Volcano Network (PVN). Latest measurements of CO2 and temperature on Feb. 2021, yielded sl…Open article
Pinatubo volcano (Luzon, Philippines) - Smithsonian / USGS Weekly Volcanic Activity Report for 3 March-9 March 2021 (New Activity / Unrest)
Wednesday, Mar 3, 2021 | 4 years ago · VN
PHIVOLCS raised the Alert Level for Pinatubo to 1 (on a scale of 0-5) on 4 March noting elevated seismicity with a total of 1,722 earthquakes recorded in two swarms since 20 January. The first swarm was recorded during 20-26 January and was comprised of local M 1-2.5 events that occurred along the S…PHIVOLCS raised the Alert Level for Pinatubo to 1 (on a scale of 0-5) on 4 March noting elevated seismicity with a total of 1,722 earthquakes recorded in two swarms since 20 January. The first swarm was recorded during 20-26 January and was comprised of local M 1-2.5 events that occurred along the Sacobia Lineament fault at depths of 15-28 km. A more persistent swarm followed; it was comprised of local M 0.5-2.8 events at depths of 10-35 km along another fault system, with a few shallower earthquakes occurring at both ends of the swarm.
Carbon dioxide flux at Pinatubo Crater lake was 378 tonnes per day in February, within background ranges that topped 1,000 tonnes per day during the last deca…Open article
Carbon dioxide flux at Pinatubo Crater lake was 378 tonnes per day in February, within background ranges that topped 1,000 tonnes per day during the last deca…Open article
Pinatubo volcano (Philippines): swarm of small quakes no reason to worry about volcano
Thursday, Jan 28, 2021 | 4 years ago · T
A swarm of small earthquakes has been occurring under the volcano. Since 20 January 2021, the Pinatubo Volcano Network (PVN) and the Philippine Seismic Network (PSN) have recorded a total of 826 imperceptible earthquakes in an area east-northeast of Pinatubo volcano in the vicinities of the City of …A swarm of small earthquakes has been occurring under the volcano. Since 20 January 2021, the Pinatubo Volcano Network (PVN) and the Philippine Seismic Network (PSN) have recorded a total of 826 imperceptible earthquakes in an area east-northeast of Pinatubo volcano in the vicinities of the City of Mabalacat, Pampanga, PHIVOLCS reported in a special bulletin:
"The strongest of these earthquakes occurred on 25 January at depths of 15-28 kilometers and ranged between ML1.0 and ML2.5 in magnitudes. Based on the general distribution of located events, these earthquakes were generated along a segment of the Sacobia Lineament, a fault that was last active during the post-eruption period of 1991.
"Th…Open article
"The strongest of these earthquakes occurred on 25 January at depths of 15-28 kilometers and ranged between ML1.0 and ML2.5 in magnitudes. Based on the general distribution of located events, these earthquakes were generated along a segment of the Sacobia Lineament, a fault that was last active during the post-eruption period of 1991.
"Th…Open article
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Pinatubo volcano (Luzon, Philippines) - Smithsonian / USGS Weekly Volcanic Activity Report for 4 February-10 February 2004 (Continuing Activity)
Wednesday, Feb 4, 2004 | 21 years ago · VN
According to a news article, on 22 January tourists noticed that the usually blue-to-green water in Pinatubo's crater lake was very dark brown. Scientists from the Pinatubo Volcano Observatory excluded renewed volcanism as the source of the discoloration due to the lack of increased seismicity, and …According to a news article, on 22 January tourists noticed that the usually blue-to-green water in Pinatubo's crater lake was very dark brown. Scientists from the Pinatubo Volcano Observatory excluded renewed volcanism as the source of the discoloration due to the lack of increased seismicity, and an absence of new emissions in the crater or any increase in the water's temperature. They believed the change in water color was due to near-surface processes, such as biogenic activity or a steady supply of nutrient rich soil from landslides that have entered the crater since its formation after the June 1991 eruption.
Visitors were warned against swimming in or consuming the water in the lake.
So…Open article
Visitors were warned against swimming in or consuming the water in the lake.
So…Open article
Pinatubo volcano (Luzon, Philippines) - Smithsonian / USGS Weekly Volcanic Activity Report for 7 August-13 August 2002 (New Activity / Unrest)
Wednesday, Aug 7, 2002 | 23 years ago · VN
On 10 July the western wall of Pinatubo's crater collapsed, gradually releasing about 160 million m3 of water and sediments. The collapse occurred at the crater wall's lowest point leading to the Maraunot River in Botolan, Zambales. About a year earlier workers had removed a section of the crater wa…On 10 July the western wall of Pinatubo's crater collapsed, gradually releasing about 160 million m3 of water and sediments. The collapse occurred at the crater wall's lowest point leading to the Maraunot River in Botolan, Zambales. About a year earlier workers had removed a section of the crater wall in an effort to gradually release the rapidly rising water in the crater and prevent a larger crater-wall collapse.
PHIVOLCS reported to Philstar news that if the notch had not been created at least 320 million m3 of water and sediment could have been released into inhabited areas.
Source: Philstar News
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From: Global Volcanism Program, 2002. Report on Pinatubo. In: Mayberry, G (ed.), Weekly Volc…Open article
PHIVOLCS reported to Philstar news that if the notch had not been created at least 320 million m3 of water and sediment could have been released into inhabited areas.
Source: Philstar News
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From: Global Volcanism Program, 2002. Report on Pinatubo. In: Mayberry, G (ed.), Weekly Volc…Open article
Pinatubo volcano (Luzon, Philippines) - Report for 5 September-11 September 2001 (Continuing Activity)
Wednesday, Sep 5, 2001 | 24 years ago · VN
On 6 September workers began to partially drain Pinatubo's rapidly rising crater lake following the evacuation of ~40,000 NW-flank residents the previous day. Initially water flowed slowly at ~50 m3 per hour through the newly completed ~100-m-long spillway, but after workers increased the gradient a…On 6 September workers began to partially drain Pinatubo's rapidly rising crater lake following the evacuation of ~40,000 NW-flank residents the previous day. Initially water flowed slowly at ~50 m3 per hour through the newly completed ~100-m-long spillway, but after workers increased the gradient at the canal's exit the flow rate increased to ~1,800 m3 per hour. According to news reports, over several days the draining aimed to release ~25% of the water in the crater towards the NW down the Bucao River to the South China Sea.
Most residents were permitted to return to their homes on 7 September. According to reports on 10 September, the level of the crater lake continued to rise following th…Open article
Most residents were permitted to return to their homes on 7 September. According to reports on 10 September, the level of the crater lake continued to rise following th…Open article
Pinatubo volcano (Luzon, Philippines) - Report for 29 August-4 September 2001 (Continuing Activity)
Wednesday, Aug 29, 2001 | 24 years ago · VN
Due to the threat of Pinatubo's crater lake overflowing during draining procedures, Philippine officials plan to evacuate ~40,000 residents of the town of Botolan 40 km NW of Pinatubo's crater to higher ground on 5 September. The crater lake is ~2.5 km wide, and contains ~210 million cubic meters of…Due to the threat of Pinatubo's crater lake overflowing during draining procedures, Philippine officials plan to evacuate ~40,000 residents of the town of Botolan 40 km NW of Pinatubo's crater to higher ground on 5 September. The crater lake is ~2.5 km wide, and contains ~210 million cubic meters of water. According to a Guardian news article, water in the crater rose to ~80 cm below the lowest point of the crater rim on 3 September.
In comparison, water was 1.5 m below the rim on 31 August, and 4.5 m below it 5 weeks earlier. On 6 September workers plan to remove a 5-m-large portion of the crater's wall that will cause the water to be released towards the N.
Sources: ABC News - Australian Bro…Open article
In comparison, water was 1.5 m below the rim on 31 August, and 4.5 m below it 5 weeks earlier. On 6 September workers plan to remove a 5-m-large portion of the crater's wall that will cause the water to be released towards the N.
Sources: ABC News - Australian Bro…Open article
Pinatubo volcano (Luzon, Philippines) - Report for 8 August-14 August 2001 (Continuing Activity)
Wednesday, Aug 8, 2001 | 24 years ago · VN
Several news reports stated that rising water in Pinatubo's crater is now approaching dangerous levels. If the water exceeds the crater lip, it could cause the crater to partially collapse and water could inundate the town of Botolan. The town is 40 km NW of the volcano and has 46,000 residents.
In r…Several news reports stated that rising water in Pinatubo's crater is now approaching dangerous levels. If the water exceeds the crater lip, it could cause the crater to partially collapse and water could inundate the town of Botolan. The town is 40 km NW of the volcano and has 46,000 residents.
In recent weeks the water surface has risen from ~6.4 to 5 m below the crater lip. Scientists are worried that the intense rain during the current rainy season will cause the water level to continue to rise. In the next few weeks, with oversight by Philippine officials and geologists, local residents will dig a 5-m notch in the side of the crater that will drain the water away from inhabited areas.
Sou…Open article
In r…Several news reports stated that rising water in Pinatubo's crater is now approaching dangerous levels. If the water exceeds the crater lip, it could cause the crater to partially collapse and water could inundate the town of Botolan. The town is 40 km NW of the volcano and has 46,000 residents.
In recent weeks the water surface has risen from ~6.4 to 5 m below the crater lip. Scientists are worried that the intense rain during the current rainy season will cause the water level to continue to rise. In the next few weeks, with oversight by Philippine officials and geologists, local residents will dig a 5-m notch in the side of the crater that will drain the water away from inhabited areas.
Sou…Open article
