Magnitude 5+ Earthquakes – Global

5.7 earthquake hits Atacama, Chile.

5.7 earthquake hits the central mid-Atlantic ridge.

5.3 earthquake hits north of Ascension Island.

5.2 earthquake hits the South Sandwich Islands.

5.0 earthquake hits northern Peru.

5.0 earthquake hits the Hindi Kush, Afghanistan.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

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In the Atlantic Ocean: Post Tropical Cyclone Ida is located about 25 mi…40 km ne of Montauk point New York and about 130 mi…210 km ene of New York City with maximum sustained winds…40 mph…65 km/h. Present movement…ne or 50 degrees at 28 mph…44 km/h.

Hurricane Larry is located about 545 mi…875 km wsw of the southernmost Cabo Verde islands with maximum sustained winds…75 mph…120 km/h. Pesent movement…w or 280 degrees at 20 mph…31 km/h.

In the Northwest Pacific Ocean: Tropical depression 17w (Seventeen), located approximately 1186 nm southeast of Misawa, Japan, is tracking northwestward at 07 knots.

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Spain – Civil Protection in Catalonia, Spain, reported severe flash floods in areas of Montsià and Baix Ebre on 01 September 2021. Fast flowing flood waters swept through streets in Alcanar, dragging along cars, trees and furniture. Images shared on Social Media showed around 6 wrecked cars that had been swept from the town and dumped onto the beach. Catalonia’s regional weather service Meteocat said 233.5 mm of rain fell in Alcanar in 24 hours on 01 September, including 77.7 mm in 30 minutes. The nearby town of Port dels Alfacs recorded 51.5 mm of rain in 30 minutes. Other areas of Spain also saw severe weather, including thousands of lighting strikes and heavy rain. Train services between Madrid and Toledo were interrupted.

USA – While parts of Louisiana are still under water after storm surge and torrential rain from Hurricane Ida, remnants of the storm have moved north, dumping heavy rainfall and causing flooding in parts of Pennsylvania, New York, New Jersey and Maryland. Destructive floods hit parts of Southwest Virginia in the previous 24 hours.

India – At least one person has died and many more reported missing after heavy rain caused flash floods in parts of Maharashtra state in India. Meanwhile in the north of the country 5 people have died and 2 are still missing after a landslide in Uttarakhand. The Girna river and tributaries broke their banks. Flooding also affected parts of the city of Jalgaon, bringing traffic to a standstill and causing damage to property and businesses. Flooding was also reported in parts of Ahmednagar district.



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

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Monkeypox – DR Congo

The World Health Organization (WHO) reported an additional 629 monkeypox cases in the past six weeks in the Democratic Republic of the Congo (DRC). Six additional monkeypox fatalities have also been reported. Since the beginning of the year through August 8, 2,523 cases have been reported with 66 deaths.


Roundup of Global Volcanic Activity – New Activity for the Week 25 August – 31 August 2021

Atka – Andreanof Islands (USA) : AVO lowered the Aviation Color Code and Volcano Alert Level for the Atka Volcanic Complex to Green and Normal, respectively, on 27 August, noting that seismicity had returned to baseline levels over the previous week.

Chirinkotan – Kuril Islands (Russia) : SVERT reported that during 23-26 August ash plumes from Chirinkotan were visible rising 2.5-3.5 km (8,200-11,500 ft) a.s.l. and drifting S and SW.

Fukutoku-Oka-no-Ba – Volcano Islands (Japan) : The Japan Coast Guard reported that during a 26 August overflight of Fukutoku-Oka-no-Ba, observers noted that the W island was unchanged while the E side had mostly eroded, leaving two small islands. While no eruptions were visible, gray material from the central vent was intermittently ejected to the sea surface and brown, discolored water was widely distributed, especially to the W.

Kilauea – Hawaiian Islands (USA) : HVO reported that a seismic swarm and ground deformation continued beneath the S part of Kilauea’s summit during 24-25 August. The rate of earthquakes per hour peaked at 28 during 1900-2000 on 24 August and then decreased to 5-12 through 25 August. Most of the earthquakes were between magnitudes 1 and 2, occurring at depths of 1-2 km. By 26 August seismicity and ground deformation levels had decreased, suggesting magma was no longer moving; HVO lowered the Volcano Alert Level and Aviation Color Code to Advisory and Yellow, respectively. Later that day, ground deformation began again in the S part of the caldera at around 1800 and was followed by an increase in seismicity after 2030. Earthquakes in the swarm were located at depths of 1-3 km. The strongest earthquake was a M 2.8, though the majority were less than M 1. The rate of events per hour was 16, with a peak of 24 just after midnight on 27 August, and then declined to about six. Seismicity remained low through 30 August with 7-8 events per hour, all under M 2 and at depths of 1-4 km. Deformation continued to be detected at variable rates. Although the deformation and seismicity suggested renewed magma movement, the data did not indicate an upward movement of magma.

Krysuvik-Trolladyngja – Iceland : The fissure eruption in the W part of the volcanic system, close to on the Reykjanes Peninsula, continued during 25-31 August, though weather often obscured the view of the vents. Low lava fountaining and overflows from the main vent were interspersed with periods of calm. Parts of the crater sometimes collapsed and produced minor ash clouds based on webcam views. According to a news article, lava flowed into the S part of Meradalir valley and then down a hillside into Nàtthagi valley on 26 August in multiple branches. Observers noted that parts of the flows were turbulent and splashed above the flow surface. Lava stopped advancing at around 1600 as the eruption paused. A geophysicist noted that lava had been flowing S more often due to the new vent that had opened on the flank of the cone during the previous few weeks. The Aviation Color Code remained at Orange due to the lack of ash and tephra emissions, though IMO warned of the potential for lapilli and scoria fallout within a 650 m radius of the active vent. Authorities also warned of gas emission hazards.

Pavlof – United States ; AVO reported that several small daily explosions at Pavlof were recorded by seismic and infrasound sensors during 24-26 August. A pilot observed an ash plume from an explosion that rose to 3.7 km (12,000 ft) a.s.l on 25 August. Seismicity was relatively quiet during 27-31 August; elevated surface temperatures continued to be recorded on most of those days. One explosion on 28 August produced an ash emission visible in webcam data.

Semisopochnoi – Aleutian Islands (USA) : AVO reported that eruptive activity at Semisopochnoi’s North Cerberus crater continued during 25-31 August. Multiple daily explosions were detected by seismic and infrasound networks. Ash-and-steam plumes from the explosions were sometimes confirmed in webcam images, in satellite data, and by nearby observers; plumes rose no higher than 3 km (10,000 ft) a.s.l. and produced local ashfall on the island. Daily sulfur dioxide emissions were identified in satellite images, drifting as far as 300 km NW during 29-31 August.