Teo Blašković founded The Watchers in 2011 and edited it until 2026, covering seismic and volcanic activity, extreme weather, space weather and near-Earth objects. Articles on this page are his archive.
While the largest volcano on Earth — Mauna Loa is not erupting, rates of deformation and seismicity at the summit remain slightly elevated and above long-term background levels. Other Mauna Loa monitoring data streams show no significant change in deformation rates…
Hawaiian Kilauea volcano continues erupting since December 20, 2021, with lava activity confined to the Halemaʻumaʻu crater. On April 15, the lava lake was 227 m (745 feet) deep and remains stagnant over its eastern half. SO2 emission rates remain elevated at 950…
Tropical Storm "Surigae" entered the Philippine Area of Responsibility (PAR) late April 15, 2021, and intensified into a typhoon — known locally as Bising. Surigae is the second named storm and the first typhoon of the 2021 Pacific typhoon season. Surigae…
The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to Red and the Alert Level to Warning for Semisopochnoi volcano on Friday, April 16, 2021, after sustained ash emissions rose up to 6 km (20 000 feet) a.s.l. Satellite data suggest ash emissions…
Solar wind parameters over the past 12 hours indicated the arrival of a slow-moving Coronal Mass Ejection (CME), likely produced on April 10. A period of G1 – Minor storming began at 08:59 UTC on April 15. Another enhancement in parameters is expected on April 16…
A newly-discovered asteroid designated 2021 GN10 will fly by Earth at a distance of 0.75 LD / 0.00192 AU (287 227 km / 178 475 miles) at 22:30 UTC on April 15, 2021. This is the 44th known asteroid to fly by Earth within 1 lunar distance since the start of the year,…
Tropical Storm "Surigae" — known as Bising in the Philippines — formed at 18:00 UTC on April 14, 2021, as the second named storm of the 2021 Pacific typhoon season. The storm is intensifying as it moves close to Yap on its way toward the Philippines….
A newly-discovered asteroid designated 2021 GF10 will fly by Earth at a distance of 0.30 LD / 0.00077 AU (115 190 km / 71 575 miles) at 09:29 UTC on April 15, 2021. This is the 43rd known asteroid to fly by Earth within 1 lunar distance since the start of the year…
New activity/unrest was reported for 7 volcanoes from April 7 to 13, 2021. During the same period, ongoing activity was reported for 11 volcanoes. New activity/unrest: Karymsky, Eastern Kamchatka (Russia) | Krysuvik-Trolladyngja, Iceland | Pacaya, Guatemala | Piton…
In 24 hours to 00:00 UTC on April 14, the Taal Volcano Network recorded 383 volcanic earthquakes, including 238 episodes of volcanic tremor with durations of 1 to 12 minutes, 143 low-frequency volcanic earthquakes, and low-level background tremor that started at…
