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.
A strong hydrothermal explosion took place at Costa Rica's Rincon de la Vieja volcano at 16:16 UTC (10:16 LT) on April 19, 2020. According to OVSICORI-UNA, a steam and ash plume rose approximately 1 500 m (4 900 feet) above the crater. This is 3 416 m (11 200…
A negative polarity, southern crown coronal hole extension has moved into a geoeffective position enhancing the solar wind environment. Unsettled levels are expected on April 21 as high speed stream (HSS) effects persist. By late April 22 (UTC), a positive polarity…
A moderate explosive eruption of the Strombolian and sometimes Vulcanian types continues at Russian Klyuchevskoy volcano. The Aviation Color Code remains Orange. On April 18, a lava flow began to move on the southeastern flank of the volcano. By 22:10 UTC, a…
A strong and shallow earthquake registered by the JMA as M6.1 hit near the east coast of Honshu at 20:39 UTC on April 19, 2020 (05:39 LT, April 20). The agency is reporting a depth of 50 km (31 miles). The USGS is reporting M6.4 at a depth of 41.7 km (25.9 miles);…
Volcanic tremor amplitude at Etna volcano, Italy showed a rapid increase to high values early Sunday morning, April 19, 2020. This activity was followed by lava fountaining and strong ash emissions, INGV Osservatorio Etneo reports. The Aviation Color Code was raised…
The European Sentinel-2 satellite acquired first clear sky images of Indonesian Anak Krakatau volcano after strong eruption on April 11, 2020. The activity level of the volcano remains at 2 (Waspada) — residents and tourists are not allowed within 2 km (1.2 miles)…
A very strong earthquake registered by the JMA as M6.8 at a depth of 490 km (304 miles) struck the Ogasawara (Bonin Islands) region of Japan at 08:25 UTC (17:26 JST) on April 18, 2020. The USGS is reporting M6.6 at a depth of 458 km (284 miles); EMSC M6.6 at a depth…
An outbreak of severe thunderstorms will be possible across much of the Deep South and Southeast U.S. on Sunday. April 19, 2020, the National Weather Service (NWS) warned on April 17. Damaging winds, large hail, and tornadoes will be the main threats. Heavy rainfall…
A strong and shallow earthquake registered by the USGS as M5.9 hit Myanmar at 11:45 UTC (18:15 local time) on April 16, 2020. The agency is reporting a depth of 10 km (6.2 miles). EMSC is reporting M5.9 at a depth of 30 km (18 miles). The epicenter was located 38.5…
On April 15, 2020, French national public expert in nuclear and radiological risks — Institute for Radiological Protection and Nuclear Safety (IRSN) — issued a new information report which provides an assessment of the possible radiological impacts for the…
