Earthquakes

Magnitude 5+ Earthquakes – Global

5.2 earthquake hits the Chagos Archipelago.

5.1 earthquake hits the northern mid-Atlantic ridge.

5.1 earthquake hits Tarapaca, Chile.

5.0 earthquake hits Guam.

5.0 earthquake hits the Hindu Kush, Afghanistan.

5.0 earthquake hits the Kermedec Islands.

5.0 earthquake hits southeast of Easter Island.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

There are no current tropical storms.

NewsBytes:

Papua New Guinea – More than 200 households have been affected due to flooding in Morobe province of west coast of Papua New Guinea. The Rumu river overflowed. Also damages have been reported to several houses and public buildings across Gabnaron and Zifasing villages.

Greece – Heavy rainfall flooded several houses and shops in Skopelos. Similarly, road damage and landslides have been reported in Zagora-Mouresi Municipality. Mudslides have obstructed the the road linking Zagora and Horefto.

Crete – Authorities in eastern Crete closed the Lasithi plain to traffic to prevent accidents Thursday after the area flooded following four days of intense rainfall. This is the fifth time this year the plain has flooded and that the intensity and duration of the storms, which started on Monday evening and stopped yesterday morning, were unprecedented for the season.

Global Warming

Vanishing Ocean Buffer

The heating of the surface waters of the western North Atlantic under climate change has caused that important layer to shrink, which an international team of researchers says has crippled the water’s ability to absorb the atmosphere’s excess carbon dioxide and heat.

The North Atlantic Subtropical Mode Water has historically been about 800 feet thick. But more than 90% of that layer has been lost due to the warming of the past decade, according to a study published in the journal Nature Climate Change.

The loss is said to also threaten the region’s phytoplankton, the base of the marine food chain near the ocean’s surface.

Wildlife

Chinese Snake Trade

China’s ban on the sale of wild animals because of the coronavirus crisis has nearly wiped out the local economy of an area known for breeding snakes for food.

While experts say the disease probably didn’t emerge directly from snakes, Reuters reports factory and backyard snake farms around Zisiqiao village in Zhejiang province are no longer in business.They had been a key source of the reptiles for restaurants and traditional medicine.

Intensive snake farming has resulted in an increase in the transmission of parasites and various infectious diseases, according to a recent Wuhan University study.

Environment

Global Temperature Extremes

The week’s hottest temperature was 114 degrees Fahrenheit (46.7 degrees Celsius) in Matam, Senegal.

The week’s coldest temperature was minus 83.0 degrees Fahrenheit (minus 66.1 degrees Celsius) at Vostok, Antarctica.

Temperatures were tabulated from the more than 10,000 worldwide synoptic weather stations. The United Nations World Meteorological Organization sets the standards for weather observations, and provides a global telecommunications circuit for data distribution.

Wildfires

Wildfires – Chernobyl, Russia

Wildfires raging around Ukraine’s crippled Chernobyl nuclear power plant caused a local spike in radiation but did not affect levels in the capital of Kiev or other nearby areas, according to Yegor Firsov, Ukraine’s ecological inspection service chief.

Firefighters battled blazes across 50 acres inside the Chernobyl Exclusion Zone, which may have been deliberately ignited. That area of Ukraine is currently experiencing an extended period of dry weather.

Disease

COVID-19

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Ebola – DR Congo

No new cases have been reported in the ongoing Ebola virus disease (EVD) outbreak in the Democratic Republic of the Congo since 17 February 2020.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 1 April 2020 – 7 April 2020

Aira | Kyushu (Japan) : JMA reported that during 30 March-6 April incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. The seismic network recorded 22 eruptive events and one explosion (at 1558 on 4 April). The highest plume during the period rose to 3.8 km above the crater rim, visible at 1621 on 4 April. Material was ejected 500-900 m away from the crater. The Alert Level remained at 3 (on a 5-level scale).

Asosan | Kyushu (Japan) : JMA reported that eruptive activity at Asosan was recorded during 9-16 March. Gray-to-white ash plumes rose as high as 1 km above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate was high; the rate on 2 April was 1,900 tons per day. The Alert Level remained at 2 (on a scale of 1-5).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 1-7 April ash plumes from Dukono rose to 1.8-2.4 km (6,000-8,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 29 and 31 March and 1-2 April that sent ash plumes up to 2.2 km (7,200 ft) a.s.l. Ash plumes drifted NE and E, causing ashfall in Severo-Kurilsk on 1 April. A thermal anomaly was identified in satellite images during 30-31 March. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 29 and 31 March and 1-2 April that sent ash plumes up to 2.2 km (7,200 ft) a.s.l. Ash plumes drifted NE and E, causing ashfall in Severo-Kurilsk on 1 April. A thermal anomaly was identified in satellite images during 30-31 March. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ibu | Halmahera (Indonesia) : The Darwin VAAC reported that on 2 April an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SW based on satellite images and weather models. On 7 April an ash plume rose to 1.8 km (6,000 ft) a.s.l. and drifted S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Karangetang | Siau Island (Indonesia) : PVMBG reported that during 30 March-5 April lava continued to effuse from Karangetang’s Main Crater (S), traveling as far as 1.8 km down the Nanitu, Pangi, and Sense drainages on the SW and W flanks. Sometimes dense white plumes rose up to 300 m above the summit; foggy weather occasionally prevented observations. Incandescence from both summit craters was visible at night. The Alert Level remained at 2 (on a scale of 1-4).

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian activity at Klyuchevskoy was visible during 27 March-3 April, and a bright thermal anomaly was identified in satellite images those same days except for 1 April. Vulcanian activity was visible during 29-20 March; ash plumes drifted as far as 455 km E and NE at altitudes of 5.5-6 km (18,000-19,700 ft) a.s.l. on those same days. The Aviation colour Code remained at Orange.

Kuchinoerabujima | Ryukyu Islands (Japan) : JMA reported that during 30 March-3 April white plumes rose 500 m above the rim of Kuchinoerabujima’s Shindake Crater. Sulfur dioxide emissions were at high levels. Very small eruptive events during 5-6 April generated plumes that rose 900 m and merged into weather clouds. The Alert Level remained at 3 (the middle level on a scale of 1-5).

Merapi | Central Java (Indonesia) : PVMBG and BPPTKG reported that incandescence from Merapi’s summit crater was visible at night and in the morning during 30 March-5 April. White plumes with variable densities rose as high as 600 m above the summit. An eruption at 1510 on 2 April generated an ash plume that rose 3 km above the summit. The morphology of the lava dome in the summit crater changed slightly based on a comparison of photos (taken from the DELES 3 station, SW) from 15 March to 2 April. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

Nevados de Chillan | Chile : The Buenos Aires VAAC reported that during 1-2 and 4-6 April ash plumes from Nevados de Chillán rose to altitudes of 3.7-4.3 km (12,000-14,000 ft) a.s.l. and drifted N, NE, E, and SE, based on webcam and satellite images.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported that occasional low-frequency and low-amplitude volcanic earthquakes were ongoing at Rincón de la Vieja. A steam explosion was recorded at 0240 on 1 April. An eruption at 0824 on 4 April generated a plume that rose 1 km above the crater rim. Continuous activity during part of 6-7 April produced emissions rising 50 m above the crater rim.

Sangay | Ecuador : IG reported a high level of activity at Sangay during 1-7 April. Weather clouds often prevented visual observations of the volcano; according to Washington VAAC notices ash plumes rose 570 m above the summit and drifted NW, W, and SW during 2-4 April. Signals indicating lahars were recorded by the seismic network on 2 and 5 April. Incandescent blocks were seen descending the S flank during a break in cloud cover on 4 April.

Semisopochnoi | United States : On 1 April AVO reported that seismic, infrasound, and satellite data collected during the previous two weeks indicated no signs of eruptive activity at Semisopochnoi; the Aviation colour Code was lowered to Yellow and the Volcano Alert Level was lowered to Advisory. A crater lake and robust steam plume were both identified in recent satellite images.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 27 March-3 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Shishaldin | Fox Islands (USA) : AVO reported elevated seismicity at Shishaldin during 1-7 April characterized by weak continuous tremor and occasional low-frequency earthquakes. The webcam recorded steam plumes rising from the summit crater on 1 April. Weakly elevated surface temperatures were visible in satellite images on a few days. The Volcano Alert Level remained at Watch and the Aviation colour Code remained at Orange.

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that during 27 March-3 April incandescence from Suwanosejima’s Ontake Crater was visible nightly. An eruptive event on 2 April produced a grayish-white plume that rose 800 m above the crater rim; ringing sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Yasur | Vanuatu : Based on webcam images and information from the Vanuatu Meteorology and Geo-Hazards Department (VMGD), the Wellington VAAC reported that during 2-3 April low-level ash plumes from Yasur rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted N and SE. Ashfall was confirmed on the SSW parts of the island.