Earthquakes

Magnitude 5+ Earthquakes – Global

5.8 earthquake hits Tonga.

5.6 earthquake hits Mindanao in the Philippines.

5.2 earthquake hits the E’Entrecasteaux Islands.

5.1 earthquake hits Alaska.

5.1 earthquake hits central Peru.

5.0 earthquake hits eastern Xizang, China.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

In the Atlantic Ocean: Hurricane Isaias is located about 15 mi…25 km ssw of Great Inagua island and about 385 mi…620 km se of Nassau with maximum sustained winds…80 mph…130 km/h. Present movement…nw or 305 degrees at 17 mph…28 km/h.

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NewsBytes:

Niger and Mali – In Niger, 9 people have died, 20,174 people have been affected and 2,244 houses have been destroyed. The worst hit areas are the regions of Maradi and Tahoua, with respectively 13,667 and 4,173 people affected. According to the Ministry of the Interior, 17 people have been injured and 9 people have lost their lives, including five by drowning and four in the collapse of houses. Meanwhile in neighbouring Mali, floods have affected 7,648 people, including 5,406 Internally Displaced Persons (IDPs) in Mopti Region. Flooding was also reported in Gao and assessments are ongoing.

Caribbean – Thursday, Isaias slammed the Dominican Republic with heavy rainfall and strong winds. A tropical storm watch is listed for the east coast of Florida from Ocean Reef to Sebastian Inlet and for Lake Okeechobee. The center has warned of the risk of winds, heavy rainfall and storm surge this weekend along Florida’s east coast and spreading northward along the U.S. East Coast through early next week.

Environment

Global Quiet

The plunge in human activities worldwide in recent months due to the pandemic has brought the longest and most pronounced quiet period of seismic noise in recorded history. An international team of scientists write in the journal Science that the relative quiet has allowed them to detect previously concealed earthquake signals, which could help us more accurately tell the difference in the future between man-made and natural seismic noise. The typically quiet periods around Christmas, New Year’s and the Chinese New Year have been eclipsed by the decline of industrial production, transport and service industries brought on by COVID-19.

Environment

Global Temperature Extremes

The week’s hottest temperature was 123 degrees Fahrenheit (50.6 degrees Celsius) in Al Qaysumah, Saudi Arabia.

The week’s coldest temperature was minus 106.0 degrees Fahrenheit (minus 76.7 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.

Disease

COVID-19

The countries with the 10 greatest number of Covid-19 cases:

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Dengue Fever – Brazil

In an update on the dengue fever situation in Brazil, officials in Paraná state report 157 deaths and 217,891 confirmed cases of dengue since July 2019, when the current epidemiological period began.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 22 July 2020 – 28 July 2020

Dukono | Halmahera (Indonesia) : Based on information from PVMBG and satellite data the Darwin VAAC reported that ash plumes from Dukono rose to 2.1-2.3 km (7,000-8,000 ft) a.s.l. and drifted N, NW, and W during 22-26 and 28 July. The Alert Level remained at a 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 17-24 July that sent ash plumes up to 3.5 km (11,500 ft) a.s.l. and drifted in multiple directions. A thermal anomaly over the volcano was identified in satellite images each day; an ash cloud 11×13 km in size drifted 30 km SE on 22 July. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Popocatepetl | Mexico : CENAPRED reported that each day during 22-27 July there were 2-107 steam-and-gas emissions from Popocatépetl, some of which contained minor amounts of ash. Crater incandescence was visible most nights. Gas, steam, and ash plumes rose as high as 2 km above the crater rim and drifted NW, WSW, and SW. Minor ashfall was reported on 23 and 27 July in areas downwind, including in Tetela del Volcán (20 km SW), Ocuituco (24 km SW), Atlatlahucán (30 km WSW), Yecapixtla (20 km W), Yautepec (50 km WSW), and Jiutepec (60 km WSW), in the state of Morelos, as well as in Tlalmanalco (30 km NW), Juchitepec, Tepetlixpa (20 km W), Atlautla (17 km W), Ozumba (18 km W), and Ecatzingo (15 km SW), in the state of Mexico. Incandescent material was ejected a short distance from the crater on 25 July and was followed by minor ashfall in Ecatzingo, Atlautla, Tepetlixpa, and Juchitepec. Incandescent material was again ejected a short distance from the crater during 26-27 July. Explosions were recorded at 1135 on 27 July and 0511 on 28 July. Minor ashfall was reported in the municipalities of Tlalmanalco (30 km NW), Ayapango (22 km NW), Temamatla (32 km NW), Ecatepec, Valle de Chalco (44 km NW), Texcoco (60 km NNW), Tezoyuca (68 km NNW), Tepetlaoxtoc, Naucalpan (80 km NW), Atizapán (90 km NW), Huixquilucan (85 km NW), Nicolás Romero (95 km NW), and Tlalnepantla (80 km NW) in the state of México. The Alert Level remained at Yellow, Phase Two (middle level on a three-colour scale).

Reventador | Ecuador : On 23 July IG reported that activity at Reventador remained high. A slight increase in surficial activity during the previous two weeks was characterized by ash emissions along with pyroclastic flows that descended the W, N, and NE flanks. Ash plumes rose 0.7-1.3 km above the crater rim and drifted several kilometers NW, W, and SW. Incandescent blocks preferentially rolled down the N and NE flanks, though sometimes material was ejected onto all of the flanks.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported that periodic phreatic explosions at Rincón de la Vieja were recorded by the seismic network and webcams during 22-25 July. Sometimes the events were not visually confirmed due to weather conditions. Small eruptive events were recorded during 0700-0900 on 22 July, and during the first part of the day on 23 July; a minor steam plume was visible at 0536 on 23 July. An eruptive event at 0153 on 25 July produced a plume that rose 1 km above

Semeru | Eastern Java (Indonesia) : PVMBG reported that white-and-gray ash plumes from Semeru rose 300-500 m above the summit and drifted S and W during 23-26 and 28 July. Weather conditions prevented visual observations on 22 and 27 July. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 17-24 July. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that nighttime incandescence at Suwanosejima’s Ontake Crater was occasionally visible during 17-24 July. An explosion at 2247 on 22 July generated a gray plume that rose as high as 1.2 km above the crater rim and ejected large rocks as far as 300 m from the crater. The Tokyo VAAC reported that during 25-27 July ash plumes rose to 1.8-2.7 km (6,000-9,000 ft) a.s.l. (1-1.9 km above the crater rim) and drifted NW, N, NE. The Alert Level remained at 2 (on a 5-level scale).

Villarrica | Chile : ONEMI reported that during 1-15 July activity at Villarrica was characterized by nighttime crater incandescence, gas emission, and sporadic tephra emissions. SERNAGEOMIN reported that a long-period earthquake associated with a moderate explosion in the summit crater was recorded at 1807 on 25 July. The Alert Level remained at Yellow, the second lowest level on a four-colour scale. ONEMI maintained an Alert Level Yellow (the middle level on a three-colour scale) for the municipalities of Villarrica, Pucón (16 km N), Curarrehue, and the commune of Panguipulli, and changed the exclusion zone for the public to a radius of 500 m around the crater.