Global Volcanic Activity – New Activity for the week of 25 September – 1 October 2019

Copahue | Central Chile-Argentina border : On 30 September OVDAS-SERNAGEOMIN, ONEMI, and SEGEMAR reported that three long-period (LP) earthquakes with notable magnitudes were located about 5.8 km NE of Copahue’s El Agrio Crater. In addition, abundant LP and volcano-tectonic (VT) signals with relatively lower magnitudes were also located in the same area. Some of the events were felt by residents of Caviahue (10 km E) and Copahue 7 km NE) in Argentina. SERNAGEOMIN raised the Alert Level to Orange (second highest level on a four-colour scale) and ONEMI updated the Yellow Alert (the middle level on a three-colour scale) for residents, noting a restriction for entering a 5-km radius from El Agrio Crater. The seismic network recorded a local M 3.1 VT earthquake at 2340 on 30 September, and a local M 3.7 VT event at 0628 on 1 October. The report also noted that 14 lower-energy events (largest was M 2.4) were recorded.

Poas | Costa Rica : OVSICORI-UNA reported that during 16-26 September sulfur dioxide emissions from Poás drifted W and NE, causing a sulfur odor in Alajuela, Heredia, San José, and Cartago. Acidic rain was recorded at the official’s house in the Poás Volcano National Park (PNVP) on 23 September and at Universidad Nacional Costa Rica (UNA) in Heredia on 26 September. At 0540 on 30 September a five-minute-long phreatic eruption ejected sediment, and produced a plume that rose 2 km above the crater rim and drifted SW. Ashfall and a sulfur odor was reported in Trojas de Sarchi and Grecia. Officials closed the PNVP because of the eruption and ongoing elevated seismicity; the park remained closed the next day.

Ulawun | New Britain (Papua New Guinea) : RVO reported that small, discrete, volcano-tectonic earthquakes at Ulawun began occurring more regularly around 1000 on 30 September; by 1130 they were frequent and by 1220 they were characterized as a swarm. The magnitude of the events overall increased with time and some were felt by residents and accompanied by booming sounds. Events were less frequent and intense during 1730-1930. Sometime afterwards RSAM values erratically increased, reaching a high of 10,000 units between 0130 and 0200 on 1 October. The Alert Level was raised to Stage 2 (the second lowest level on a four-stage scale). Periods of volcano-tectonic earthquakes slowly transformed into continuous tremor with distinct bursts of high-frequency signals marking discrete volcano-tectonic events during 0430-0500 on 1 October. During this time a new vent opened in a deep valley on the SSW flank at 700 m elevation. The eruption was described as a distinct incandescent glow formed from ejecting material rising less than 100 m above the vent. By dawn light-gray ash plumes were visible rising several hundred meters and drifting NW. Lava fountaining continued throughout the day, and gray ash plumes rose several kilometers above the vent and drifted W. RVO recommended that the Alert Level be raised to Stage 3. On 2 October lava fountains rose several hundred meters and ash-and-steam plumes rose to variable heights between 2 and 5 km, causing ashfall in Navo (W). A lava flow which emerged during the night traveled 1-2 km NW, though visibility was hindered due to weather conditions. Loud rumbling and roaring was noted. Seismicity remained high with RSAM values passing 12,000 units.


Magnitude 5+ Earthquakes – Global

5.4 earthquake hits the Macquarie Islands.

5.2 earthquake hits the southern mid-Atlantic ridge.

5.1 earthquake hits offshore Oaxaca, Mexico.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

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In the Atlantic Ocean: Hurricane Lorenzo is located about 220 mi…355 km nne of Flores island in the western Azores with maximum sustained winds…90 mph…150 km/h. Present movement…ne or 40 degrees at 43 mph…69 km/h.

In the Western Pacific Ocean: Typhoon (td) 19w (Mitag), located approximately 182 nm south-southwest of Kunsan AFB, South Korea, is tracking north-notheastward at 15 knots.

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UK – More rain and winds are expected in parts of the country later this week as the remnants of Hurricane Lorenzo arrive in the UK. The storm – the most powerful hurricane ever recorded in the far east Atlantic – will have lost most of its power by the time it arrives on Thursday. It comes after torrential rain brought flash flooding and led to some places being evacuated on Tuesday. On the Isle of Man a major incident was declared with people trapped in their homes indoors. Elsewhere, some areas in the Midlands, Wales and southern England were hit by a week’s rain in just an hour, as thunderstorms swept across the UK. Roads and railways were closed and some flights from London’s Heathrow Airport were delayed on Tuesday evening due to the bad weather. Dozens of flood warnings and alerts remain in place across England.


Chikungunya – Ethiopia

In update on the chikungunya outbreak in Ethiopia, officials report an additional 3618 new suspect cases during the past week from neighborhoods in the Dire Dawa City. This is a slight decrease in cases compared to recent weeks. To date, 46,326 chikungunya cases have been reported since the end of July.

Monkeypox – Cameroon

Health officials have reported a confirmed case of monkeypox in the Ekondo-Titi health district in South-west region of Cameroon last week. Supportive measures for case management have been put in place and community-based surveillance has been stepped up in the region. The region and the country is also experiencing outbreaks of cholera and measles.


Magnitude 5+ Earthquakes – Global

5.6 earthquake hits Antofagasta, Chile.

5.4 earthquake hits the southern east Pacific rise.

5.3 earthquake hits off the east coast of North Island, New Zealand.

5.1 earthquake hits Broken Ridge.

5.0 earthquake hits the eastern Sea of Japan.

5.0 earthquake hits the Volcano Islands off Japan.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

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In the Atlantic Ocean: Hurricane Lorenzo is located about 630 mi…1010 km sw of Flores in the western Azores with maximum sustained winds…100 mph…155 km/h. Present movement…ne or 40 degrees at 22 mph…35 km/h.

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In the Eastern Pacific Ocean: Tropical Depression Narda is located about 70 mi…115 km nw of Los Mochis Mexico and about 120 mi…195 km se of Guaymas Mexico with maximum sustained winds…40 mph…65 km/h. Present movement…nw or 325 degrees at 14 mph…22 km/h.

In the Western Pacific Ocean: Typhoon (td) 19w (Mitag), located approximately 156 nm south-southeast of Shanghai, China, is tracking northward at 15 knots.


India – More than 100 people have been killed over the last four days after a heavy spell of retreating monsoon rains flooded wide areas in northeast India’s Uttar Pradesh (UP) and Bihar states. Patna has received more than 200mm of rain since Friday, according to the weather department. Days of downpour left almost 80 percent of Patna localities, including hospitals and schools, flooded. Residents reported knee-deep water across the city.

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Russia puts out all wildfires

Russia has extinguished all wildfires in the country, which hit a total area of 10.337 million hectares, the Russian Aerial Forest Protection Service said Monday.

Wildfires – Amazon

Wildfires are still raging in the Amazon rainforest.

Twelve million hectares have burnt so far, three times more than last year. This means an area nearly the size of Greece.

Brazil paid the hardest price, but the flames are ravaging also some other of the nine countries the Amazon spans to. In Bolivia, 5,000 people are fighting the blaze, but it is still out of control.

It has been dubbed as the worst fires in living memory. Since January, 5 million hectares of forest and savanna were lost in Bolivia, two million just in the past two months. The flames are threatening 1,200 species. As a result, Amazon’s indigenous communities say this is an ‘environmental genocide’.


Eastern Equine Encephalitis – Michigan, USA

In a follow-up on the Eastern Equine Encephalitis (EEE) situation in Michigan, state health officials now report nine human EEE cases from six counties. Three deaths are among the nine cases.

Legionnaires Disease – North Caroline, USA

North Carolina state health officials were first notified about an increase in the number of Legionnaire’s disease cases in Buncombe and Henderson counties about one week ago. The investigation focused on people who attended the NC Mountain State Fair held Sept. 6–15 at the Western North Carolina Agricultural Center in Fletcher, NC. To date, health officials have reported 83 Legionella cases (79 Legionnaires’ disease and 4 Pontiac fever), including one fatality.