Earthquakes

Magnitude 5+ Earthquakes – Global

5.6 Earthquake hits the northern Yukon Territory, Canada.

5.2 Earthquake hits central Iran.

5.1 Earthquake hits Fiji.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

In the Western Pacific: Tropical Depression 32w (Kai-Tak) is located approximately 297 nm north-northeast of Singapore, and is tracking southwestward at 07 knots.

Tropical storm 33w (Tembin), located approximately 446 nm south-southwest of Manilla, Philippines, and is tracking westward at 20 knots.

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Wildlife

Deafening Spawn

Dolphins and other sea mammals swimming in Mexican waters may be made deaf from exposure to the loud noises generated in the spawning frenzies of one fish species.

A new report documents how this happens at a single site each spring in the far northern Gulf of California when Gulf corvina gather by the millions to spawn.

“These spawning events are among the loudest wildlife events found on planet Earth,” said researcher Timothy Rowell of the University of California San Diego.

The sounds, which are described as resembling “a really loud machine gun,” could at least temporarily deafen nearby seals, sea lions and dolphins.

Environment

Global Temperature Extremes

The week’s hottest temperature was 113 degrees Fahrenheit (45.0 degrees Celsius) in Oodnadatta, South Australia.

The week’s coldest temperature was minus 53.0 degrees Fahrenheit (minus 47.2 degrees Celsius) at Oimyakon, Siberia.

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

Monkeypox – Nigeria

From 4 September through 9 December, 172 suspected and 61 confirmed cases have been reported in different parts of the country. The majority of cases are male (75%) and aged 21–40 years old (median age = 30 years old). One death has been reported in an immune-compromised patient not receiving anti-retroviral therapy.

Cholera – Nigeria

Four persons have been killed following the outbreak of cholera disease in Shege ward of Toto Local Government Area of Nasarawa State. Thirty-eight cases of the disease were confirmed in the area and four of the patients died on their way to the primary healthcare facility in the ward.

Cholera – Yemen – Update

It had already become the world’s biggest cholera outbreak in recent history, but now the number of suspected cholera cases in Yemen since April has hit 1 million, and at an incredibly fast speed. While the rate of cholera contraction is beginning to slow in Yemen, doctors are concerned the reprieve will be short, and fear the onset of diphtheria, another disease that can be deadly, especially for children. A rapid response by nongovernmental organizations has meant that, although 2,227 people so far have died, according to the WHO, the survival rate has been relatively high.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the week of 13 December – 19 December 2017

Aira | Kyushu (Japan) : JMA reported that very small events occurred at Minamidake Crater (at Aira Caldera’s Sakurajima volcano) on 14 and 18 December, and at Showa Crater on 16 December. The Alert Level remained at 3 (on a 5-level scale).

Cleveland | Chuginadak Island (USA) : AVO reported that a small explosion at Cleveland was detected in seismic and infrasound data at 1817 on 17 December; no eruption plume was visible in satellite observations, though conditions were cloudy. The Aviation colour Code remained at Orange and the Volcano Alert Level remained at Watch.

Dukono | Halmahera (Indonesia) : Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 13-19 December ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NE, ENE, and E.

Ebeko | Paramushir Island (Russia) : Based on observations by volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions during 8-9 and 11 December generated ash plumes that rose as high as 2.3 km (7,500 ft) a.s.l. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Fuego | Guatemala : INSIVUMEH reported that activity at Fuego increased on 14 December. Vulcanian explosions generated ash plumes that rose 1.7 km above the crater and drifted 15 km NW, N, and NE. Ashfall was reported in San Miguel Dueñas, Alotenango (8 km ENE), and Ciudad Vieja (13.5 km NE). Explosions caused rumbling noises and shock waves that rattled nearby structures. The high level of activity continued during 14-15 December with 5-8 explosions per hour causing shock waves and rumbling. Ash plumes rose 1.2 km and drifted 20 km W and SW, and incandescent material was ejected 200-250 m above the crater. Ash fell in Panimaché I (8 km SW), Santa Sofía (12 km SW), Morelia (9 km SW), and El Porvenir. Explosions occurred at a rate of 4-6 per hour during 16-19 December, and weak shock waves were generated. Ash plumes rose as high as 1 km and drifted 12-15 km W and SW, causing ashfall in areas downwind including Panimaché I and II, Morelia, Santa Sofia, Sangre de Cristo, Palo Verde farm, and Yepocapa. Incandescent material was ejected 150-200 m above the crater.

Karymsky | Eastern Kamchatka (Russia) : KVERT reported that an ash plume from Karymsky was identified in satellite data drifting 50 km E on 14 December. The Aviation colour Code was raised to Orange (the second highest level on a four-colour scale).

Kilauea | Hawaiian Islands (USA) : During 13-19 December HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea’s Overlook crater. Webcams recorded incandescence from long-active sources within Pu’u ‘O’o Crater and from a small lava pond in a pit on the W side of the crater. Surface lava flows were active above and on the pali, and on the coastal plain.

Lopevi | Vanuatu : The Wellington VAAC noted that on 20 December a low-level eruption plume from Lopevi was visible in satellite and webcam images drifting NW at an altitude of 1.5 km (5,000 ft) a.s.l.

Reventador | Ecuador : IG reported that on most days during 12-19 December gas, steam, and ash plumes rose 600 m above Reventador’s summit vent and drifted in multiple directions; weather clouds sometimes prevented visual observations. Crater incandescence was often visible, and blocks rolled as far as 600 m down the flanks. The Alert Level remained at Orange.

Sabancaya | Peru : Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya decreased compared to the previous week; there was an average of 55 explosions recorded per day during 11-17 December. Seismicity was dominated by long-period events, with signals indicating emissions. Gas-and-ash plumes rose 2.5 km above the crater rim and drifted 50 km NW, W, and SW. The MIROVA system detected six thermal anomalies. The sulfur dioxide flux was high, at 2,200 tons per day on 15 December. The report noted that the public should not approach the crater within a 12-km radius.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 8, 11, and 13-14 December. The Aviation colour Code remained at Orange.

Sinabung | Indonesia : Based on observations by PVMBG, satellite and webcam images, and model data, the Darwin VAAC reported that during 13-19 December ash plumes from Sinabung rose 4-5.5 km (13,000-18,000 ft) a.s.l. and drifted ENE, ESE, SE, and S. PVMBG noted that avalanches of hot material traveled as far as 3.5 km S, SE, ESE, and E.