Magnitude 5+ Earthquakes – Global
6.0 earthquake hits central Alaska.
Magnitude 5+ Earthquakes – Global
6.0 earthquake hits central Alaska.
Tropical Storms – Roundup of Tropical Storms:
In the Southern Hemisphere: Tropical cyclone 27s (Odette), located approximately 524 nm north-northwest of Learmonth, Australia, is tracking east-southeastward at 18 knots.
Tropical cyclone 26s (Seroja), located approximately 306 nm west-northwest of Learmonth, Australia, is tracking southwestward at 10 knots.
Wildfires – Nepal
Around 1,200 hectares of forest has been destroyed by wildfires that broke out in 47 community forests of six local levels in Myagdi district with the start of the dry season this year.The bushfires consumed thousands of big and small trees, valuable medicinal herbs, wildlife and other forest products. Wildfires are reported almost daily in Beni, the district headquarters, and various other places of the district. The area destroyed by fire ranges from 10 hectares to 150 hectares of community forests.
Cosmic rays have been found to be responsible for a huge number of malfunctions in computers and other electronic devices. The high-energy protons and atomic nuclei that move through space at nearly the speed of light often strike Earth’s atmosphere.
Japan’s Nippon Telegraph and Telephone Company has determined that 30,000 to 40,000 malfunctions happen in its network alone each year due to the phenomenon.
The problems arise when electronics are struck by neutrons produced when the cosmic rays collide with oxygen and nitrogen in the atmosphere. This can cause devices from computers to mobile phones to freeze.
Easter Bunny Hunt
New Zealand hunters resumed their annual tradition of shooting thousands of invasive bunny rabbits over the Easter weekend after a four-year break in the slaughter. The fundraising event was launched more than 25 years ago with teams gathering from across the country.
Organizers say a total of 11,968 rabbits were shot, but they concede the cull isn’t expected to make much of a dent in the massive bunny population. The animals were brought to New Zealand in the 1800s and quickly overran the landscape, ravaging the native biodiversity and agriculture.
Eagles Recover in USA
America’s iconic bald eagles have recovered from the brink of extinction brought on by the once-widespread use of the pesticide DDT half a century ago. The U.S. Fish and Wildlife Service says the national symbol now numbers nearly 317,000 individual birds with an estimated 74,400 nesting pairs.
Only about 417 pairs had survived by 1963 because of the eggshell-thinning phenomenon caused by the now-banned DDT. Martha Williams, deputy director of the Fish and Wildlife Service, called the recovery “one of the most well-known conservation success stories of all time.” She says she hopes all Americans get the chance to see at least one majestic bald eagle in flight.
Global Temperature Extremes
The week’s hottest temperature was 115 degrees Fahrenheit (46.1 degrees Celsius) in Matam, Senegal.
The week’s coldest temperature was minus 91.0 degrees Fahrenheit (minus 68.3 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.
The countries with the 10 greatest number of Covid-19 cases:
Hand, Foot and Mouth Disease – Vietnam
Vietnam health officials report since the beginning of the year, the country has recorded 17,451 cases of hand, foot and mouth disease, of which 4 died.
Roundup of Global Volcanic Activity – Ongoing Activity for the Week 31 March 2021 – 6 April 2021
Aira – Kyushu (Japan) : JMA reported that during 29-30 March explosions at Minamidake Crater (at Aira Caldera’s Sakurajima volcano) produced ash plumes that rose as high as 2.7 km above the crater rim and ejected bombs 600-900 m away. An explosion was recorded on 4 April. An explosion at 0641 on 5 April ejected bombs 800-1,100 m away from the crater and generated an ash plume that rose up to 3 km above the crater rim. The Alert Level remained at 3 (on a 5-level scale).
Dukono – Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 31 March-6 April ash plumes from Dukono rose to 2.4 km (8,000 ft) a.s.l. and drifted E, SE, and SSE. 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 25 and 28-29 March that sent ash plumes up to 2.5 km a.s.l. (8,200 ft) and drifted in different directions. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).
Etna – Sicily (Italy) : INGV reported continuing episodes of lava fountaining, intra-crater explosive activity, and discontinuous ash emissions at Etna’s Southeast Crater (SEC) during the week of 29 March-4 April, though weather conditions often prevented visual observations. Gas emissions rose from the other summit craters and occasional explosive activity was visible; puffs of ash sometimes rose from Voragine Crater during 31 March-2 April. At 0707 on 31 March a loud explosion was followed by several ash puffs, marking the beginning of the 17th lava-fountaining episode since they began on 16 February. At around 1100 a thermal anomaly at the S base of SEC was visible during an overflight and in thermal camera images. Explosive activity increased by late afternoon and several lava flows effused from the S-base vent. The main part of the flow traveled towards the Valle del Bove with other smaller flows traveled S and SW. Two other vents at the S base had opened by evening and one ejected spatter a few tens of meters high. Periods of lava fountaining began through the night, and the main lava flow descended the W wall of the Valle del Bove. Strombolian activity intensified at 1950, with an eruption plume that rose to 1.2 km (4,000 ft) a.s.l. and drifted SSW. Lava fountaining began at around 0100 on 1 April. At 0218 lava overflowed the E rim of SEC and headed towards the Valle del Bove, running parallel to the flows from the S base. Lava fountains continued to be visible during the morning of 1 April and intense Strombolian activity produced dense ash plumes that drifted S. By 0940 the eruption plume had risen to 9 km (29,500 ft) a.s.l. and drifted SSW. Lava fountaining ceased around 1000 and the eruption plume rose to 5.5 km (18,000 ft) a.s.l. and drifted S. Ash fell in Milia, Nicolosi, and Catania and lapilli (1 cm in diameter) fell in Rifugio Sapienza. Lava effusion and flow advancement continued; lava from the S base of SEC spread out like a fan. A series of loud bangs were audible in the late morning and ash emissions continued until the afternoon. Lava overflowed the E rim of SEC at 1040, and a SSE flow entered the Valle del Bove at the SW wall. Explosive activity began to decline at 1320, and effusive activity waned overnight during 1-2 April.
Gareloi – United States : AVO reported that a loss of operation and communication with all seismic stations on Gareloi was likely due to snow cover. Both the Aviation colour Code and the Volcano Alert Level were changed to Unassigned, reflecting the lack of this data to detect unrest. The observatory noted that regional infrasound networks, lightning detection, and satellite images will be used to monitor and detected unrest.
Kilauea – Hawaiian Islands (USA) : HVO reported that the W vent on the inner NW wall of Kilauea’s Halema`uma`u Crater continued to supply the lava lake during 31 March-6 April. Lava flowed at a low rate from the main vent into the lake through crusted-over channels and submerged inlets. The total depth of the lake measured about 225 m and lava continued to circulate in the W part; the E half of the lake remained solidified and expanded toward the W. The sulfur dioxide emission rate was 1,200 tons/day on 1 April. HVO field crews observed weak spattering from two areas at the W vent during 1-2 April. The Aviation colour Code remained at Orange and the Volcano Alert Level remained at Watch.
Langila – New Britain (Papua New Guinea) : Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that on 5 April an ash plume from Langila rose to 1.5 km (5,000 ft) a.s.l. and drifted SW.
Lewotolok – Lembata Island (Indonesia) : PVMBG reported that the Strombolian eruption at Lewotolok continued during 30 March-6 April. Gray-and-white ash plumes rose as high as 700 m above the summit and drifted in multiple directions, though rainy weather conditions prevented visual observations during 2-3 and 5 April. Incandescent material was ejected 300-500 m above the summit and 500 m SE during 30-31 March; eruptive events were recorded by the seismic network on the other days but not visually confirmed. Rumbling was occasionally noted. According to news articles secondary lahars from Cyclone Seroja destroyed homes, and impacted as many as 300, in several villages to the SW; mud-and-debris flows and flooding severely impacted other parts of Indonesia and killed at least 70 people. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 4 km away from the summit crater.
Merapi – Central Java (Indonesia) : BPPTKG reported that the lava dome just below Merapi’s SW rim and the lava dome in the summit crater both continued to grow during 26 March-1 April. The SW rim lava-dome volume was an estimated 1,060,000 cubic meters on 1 April, with a growth rate of about 13,400 cubic meters per day, and continued to shed material down the flank. A total of 14 pyroclastic flows traveled a maximum of 1.8 km down the SW flank. Incandescent avalanches, recorded 158 times, traveled as far as 1.1 km down the SW flank. The summit lava dome had grown to 70 m tall and produced one incandescent avalanche. Minor ashfall was reported in Ngadirojo, Stabelan (4 km NW), Takeran, Tlogolele (5 km NW), Selo (3 km NNW), Pos Babadan (4 km NW), and Pasar Talun (12 km W). The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 5 km away from the summit.
Raung – Eastern Java (Indonesia) : PVMBG reported that daily gray-and-white ash plumes rose 50-500 m above Raung’s summit during 31 March-5 April and drifted N and S. 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.
Sheveluch – Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 28 March-2 April. On 3 April a plume of re-suspended ash rose to 2.5 km (8,200 ft) a.sl. and drifted 250 km ESE. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).
Shishaldin – Fox Islands (USA) AVO reinstated the Green Aviation colour Code and the Normal Volcano Alert Level for Shishaldin on 2 April, after several seismic stations again became operational following a months-long outage, thus improving the observatory’s monitoring capability.
Sinabung – Indonesia : PVMBG reported that the eruption at Sinabung continued during 31 March-6 April. Weather conditions sometimes prevented visual observations of the volcano, though daily white fumarolic plumes were visible rising as high as 500 m above the summit. Avalanches were detected daily by the seismic network and observed traveling 500-1,500 m down the E and SE flanks. An eruptive event produced a gray ash plume that rose 500 m above them summit on 1 April. Pyroclastic flows went as far as 1.5 km down the E and SE flanks. Ash plumes rose 0.7-2 km during 2-5 April and mainly drifted E and SE. The Alert Level remained at 3 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions to 5 km in the SE sector and 4 km in the NE sector.
Soufriere St. Vincent – St. Vincent : University of the West Indies Seismic Research Centre (UWI-SRC) and National Emergency Management Organisation (NEMO) reported that the lava dome in Soufrière St. Vincent’s main crater continued to slowly grow during 31 March-6 April, expanding to the N and S. Gas-and-steam continued to rise from the top of the dome, as well as along the contact with the pre-existing 1979 dome. A swarm of volcano-tectonic (VT) earthquakes began at 0638 on 5 April. The number and frequency of the VTs increased until about 0830 and then stabilized. The rate declined at around 1400 and then significantly dropped at 1600, though small VT events continued to be detected through 1800. The events were located at depths of 6 km, slightly deeper than the swarm events recorded during 22-25 March, located at revised depths of 3-5 km. Several reports of felt events came from nearby communities, including Fancy and Chateaubelair. The largest event, a M 3.5, was recorded at 0920 and felt by local residents. The swarm was more intense than the previous one, with an average rate of about 50 earthquakes per hour compared with 1.5 per hour during 22-25 March. The Alert Level remained at Orange (the second highest level on a four-colour scale).
Tanaga – Andreanof Islands (USA) : AVO reported a loss of operation and communication with all but two seismic stations on Tanaga, likely caused by snow cover. Both the Aviation colour Code and the Volcano Alert Level were changed to Unassigned, reflecting the inability to locate earthquakes to detect unrest. Monitoring will continue with the remaining seismic stations, regional infrasound networks, lightning detection, and satellite images.
Tengger Caldera – Eastern Java (Indonesia) : PVMBG reported that during 30 March-5 April white steam-and-gas plumes rose 50-700 m above the summit of Tengger Caldera’s Bromo cone. The plumes were white to gray during 1-2 April. The Alert Level remained at 2 (on a scale of 1-4), and visitors were warned to stay outside of a 1-km radius of the crater.
Ubinas – Peru : Instituto Geofísico del Perú (IGP) reported that during 29 March-4 April there were 11 volcano-tectonic earthquakes at Ubinas with magnitudes less than 1.8, and a few seismic signals indicated emissions. Sporadic steam-and-gas plumes rose as high as 200 m above the crater rim. On 5 April the Alert Level was lowered to Green (the lowest level on a four-colour scale).