Earth Changes · Sep 4, 2026Mayon SO2 Rise to 8,165 T/d; Phivolcs Flags Possible Eruption

KEMETIC MINDS
Extreme Earth Changes Watch — Daily Report — September 04, 2026

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Today’s roundup leads with Phivolcs data showing sulfur dioxide emissions from Mayon Volcano rose to 8,165 tonnes per day on September 3, a climb the Philippine news agency reports may signal a new eruption (PNA, 2026). Also covered: Greenland’s largest Arctic iceberg calving since 2020, an Ontario sinkhole closure, a magnitude 3.5 California quake, an Antarctic research-station evacuation, and fresh analysis of GPS failures during a 2025 geomagnetic storm.

• Volcano (Philippines): Phivolcs recorded Mayon Volcano’s sulfur dioxide flux at 8,165 tonnes per day on September 3, with rising emissions “may signal” a new eruption (PNA, 2026).
• Cryosphere (Greenland): A roughly 76-square-kilometer ice island calved from Petermann Glacier in August — the largest calving from any Arctic glacier since 2020 (ScienceDaily, 2026).
• Infrastructure (Canada): A storm-triggered sinkhole shut Huntington Road in Vaughan, Ontario, indefinitely while engineers assess the roadbed ^[1].
• Seismicity (California): The U.S. Geological Survey reported a preliminary magnitude 3.5 earthquake near Santa Rosa on September 3 (ABC10, 2026).
• Wildlife disease (Sub-Antarctic): Australia is withdrawing Macquarie Island research staff because H5 bird flu is predicted to cause a major elephant seal mortality event ^[2].
• Space weather (Global): A Geophysical Research Letters-published study ties a fall 2025 geomagnetic storm to GPS positioning errors above 10 meters across the United States ^[3].

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1. Philippines: Sulfur dioxide surge at Mayon Volcano

The Philippine Institute of Volcanology and Seismology on Friday reported an increase in sulfur dioxide (SO2) emissions from Mayon Volcano to 8,165 tonnes per day on Thursday, September 3 (PNA, 2026). According to the PNA report, the rising gas emissions “may signal” a new eruption (PNA, 2026).

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2. Greenland: Petermann Glacier sheds 76 sq-km ice island

A large, flat-topped iceberg known as an “ice island” broke away from Petermann Glacier on Greenland’s northwest coast in August, measuring just over 76 square kilometers (about 29 square miles) — roughly the size of St. Thomas in the U.S. Virgin Islands (ScienceDaily, 2026). It marked the largest calving event from any Arctic glacier since 2020 and the biggest from Petermann since the 2012 event, which produced an island covering 130 square kilometers (ScienceDaily, 2026).

The calving was first identified on August 4 by Adam Garbo, a doctoral student in glaciology at the University of Ottawa, using imagery from the European Space Agency’s Sentinel-1 mission (ScienceDaily, 2026). Earlier major Petermann calvings occurred in 2008 (31 square kilometers) and 2010 (just over 250 square kilometers), and as of late August two large rifts remained on the ice tongue (ScienceDaily, 2026).

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3. Vaughan, Ontario: Storm-triggered sinkhole closes Huntington Road

A sinkhole opened during Wednesday’s fast-moving, flood-triggering storm near Rutherford Road and Huntington Road, and the city has closed Huntington Road between Rutherford Road and Trade Valley Drive indefinitely ^[1]. Crews and engineers are assessing how much of the roadbed has been compromised; officials say such closures are necessary because sinkholes often signal deeper structural issues beneath the asphalt ^[1].

“With that much rainfall in a short period of time … it can really overwhelm infrastructure,” Vaughan Mayor Steven Del Duca told CityNews ^[1]. The city has not provided a repair timeline, and drivers are being asked to detour around the area ^[1].

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4. California: Magnitude 3.5 earthquake near Santa Rosa

The U.S. Geological Survey reported a preliminary magnitude 3.5 earthquake that struck the Larkfield-Wikiup area near Santa Rosa, California, on Thursday morning, September 3 (ABC10, 2026). No damage or injury details were included in the initial report.

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5. Macquarie Island: Australia withdraws staff as seal die-off risk looms

The Australian Antarctic Division is pulling all researchers from its Macquarie Island station for the rest of the year because expert assessments predict that a strain of H5 bird flu will soon cause a “significant mortality event” among the island’s elephant seals during the upcoming breeding season ^[2]. Young elephant seals appear especially vulnerable, with past outbreaks showing pup mortality rates as high as 90%, and up to 100,000 seals regularly visit the island annually ^[2].

Federal environment department deputy secretary Sean Sullivan said the decision was made “primarily for the psychological risks” facing staff who would otherwise be present “inside a mass mortality event” ^[2]. The island’s 24 current inhabitants — tradespeople, scientists, and support staff — began their roughly year-long expedition in May; thousands of seals are born near the station each spring ^[2].

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6. Space weather: Study details GPS fallout from a 2025 geomagnetic storm

New research published in Geophysical Research Letters examined a severe geomagnetic storm set off by powerful solar flares in fall 2025, with a peak phase lasting about six hours ^[3]. Using aurora surveillance cameras and GPS receiver networks across the United States and Canada, the researchers tracked signal distortions that extended from the West Coast to the East Coast and reached Florida, causing positioning inaccuracies exceeding 10 meters for several hours ^[3].

Such errors are considered critical for agricultural machinery with automatic navigation systems and for autonomous transportation ^[3]. The disturbance was notable because it was detected at mid-latitudes, whereas this type of ionospheric interference predominantly occurs near the equator and in polar regions ^[3].

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7. Scotland: Report urges preparedness for a possible 70-year El Niño

Forecasters cited in U.K. reporting warn that the El Niño phenomenon “is set to be the strongest in the last 70 years,” prompting advice that Scots stock up on food and water ahead of the extreme weather event ^[4]. The published report did not specify the timing or the agencies behind the forecast.

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What Scientists Are Saying

Phivolcs is the monitoring agency behind the elevated Mayon SO2 reading and has linked the gas trend to possible eruptive activity (PNA, 2026). At Petermann Glacier, researchers had anticipated an even larger break; as Adam Garbo put it, “What surprised us was that the calving instead followed a different fracture, producing a smaller ice island than we had originally anticipated” (ScienceDaily, 2026).

Vaughan officials say engineers must determine how much of the roadbed has been compromised before Huntington Road can safely reopen ^[1]. In the sub-Antarctic, the Australian Antarctic Division based its evacuation on expert predictions of mass seal mortality, citing the psychological toll of witnessing such an event ^[2]. The GPS study’s authors stress that coordinate offsets above 10 meters can incapacitate precision agriculture and autonomous transportation systems ^[3].

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How To Track These Events

For free, real-time monitoring of the phenomena covered in this series, the U.S. Geological Survey publishes live earthquake alerts, NOAA provides weather and space-weather products, and the Smithsonian Global Volcanism Program issues weekly activity reports on the world’s volcanoes.

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References

1. CityNews Toronto. (2026, September 3). Massive sinkhole opens in Vaughan after Wednesday's storm. https://toronto.citynews.ca/2026/09/03/vaughan-sinkhole-storm-damage-huntington-road-rutherford/ ↩a ↩b ↩c ↩d ↩e ↩f
2. Gizmodo. (2026, September 3). Australia Is Evacuating an Antarctic Base So No One Has to Watch Thousands of Seals Die. https://gizmodo.com/australia-is-evacuating-an-antarctic-base-so-no-one-has-to-watch-thousands-of-seals-die-2000807054 ↩a ↩b ↩c ↩d ↩e ↩f
3. Universe Space Tech. (2026, September 3). A significant solar storm disrupted GPS operations on Earth. https://universemagazine.com/en/a-severe-geomagnetic-storm-resulted-in-a-disruption-of-satellite-navigation-systems/ ↩a ↩b ↩c ↩d ↩e ↩f
4. MSN. (2026, September 4). Cloud looks like volcano eruption, but it's not at all. https://www.msn.com/en-us/news/other/cloud-looks-like-volcano-eruption-but-its-not-at-all/vi-AA2bz98H ↩

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