Magnitude 5+ Earthquakes – Global
6.7 earthquake hits the Mauritius-Reunion region.
5.6 earthquake hits north of Halmahera, Indonesia.
5.4 earthquake hits near the coast of central Peru.
5.4 earthquake hits the Mauritius-Reunion region.
5.3 earthquake hits south of Panama.
5.2 earthquake hits the Kuril Islands.
5.1 earthquake hits the Rat Islands in the Aleutian Islands.
5.1 earthquake hits north of Halmahera, Indonesia.
5.0 earthquake hits Vanuatu.
Tropical Storms – Roundup of Tropical Storms:
In the Northwest Pacific Ocean: Tropical storm 03w (Three), located approximately 206 nm east of Davao, Philippines, is tracking west-northwestward at 06 knots.
Kenya – Severe flooding has affected wide areas of Kenya since the start of the “Long Rains” season in early April 2021. By 23 April, over 25,000 people had been didaplced according to the Red Cross. Further heavy rainfall from 08 May has worsened the situation, with flooding reported in Kakamega, Turkana, Homa Bay, Baringo, Busia, Siaya and Kisumu counties. By 13 May, almost 1,000 families displaced in Homa Bay, Banringo and Busia. Flash floods also affected areas of Turkana and Kisumu counties. Heavy rainfall caused the Endau and Kipsangui rivers to break their banks, flooding areas of Kakamega County.
Rwanda – Hundreds of people have been forced from their homes in Rwanda‘s Western Province after heavy rain triggered a landslide in Nyamasheke district. The landslide struck on 09 May 2021 following a period of heavy rainfall. Over 100 homes were damaged, with 39 reportedly completely destroyed. Officials of Western Province Government said 631 people from 117 families were displaced as a result.
Roundup of Global Volcanic Activity – New Activity for the Week 5 May 2021 – 11 May 2021
Bulusan – Luzon (Philippines) : PHIVOLCS stated that unrest at Bulusan had increased, noting that 62 volcanic earthquakes were recorded during 7-10 May and 124 were recorded during 10-11 May. Inflation of the upper flanks first recorded on 6 March in tilt data was sustained. GPS data indicated short-term inflation starting in late February, though the long-term pattern since July 2019 showed deflation. The data suggested shallow hydrothermal processes. The Alert Level for Bulusan was raised to 1 on 11 May, reflecting abnormal conditions, and the public was reminded not to enter the 4-km-radius Permanent Danger Zone (PDZ).
Nevados de Chillan – Chile : SERNAGEOMIN noted that sulfur dioxide emissions and thermal anomalies at Nevados de Chillán’s Nicanor Crater had both increased in March, and inflation began on 27 March. During the second half of April the dome grew at a higher rate, with growth concentrated on the W part. The dome was 66 m high at the center. The L5 lava flow advanced and was about 940 m long, and 50 m thick near the flow front. The effusion rate increased on 28 April. During 2-5 May activity was characterized by increased crater incandescence and a series of intense explosions that destroyed part of the summit lava dome. Dense ash plumes rose above the crater. Block-and-ash flows traveled less than 400 m down the NE flank and pyroclastic flows traveled short distances SW. During 4-5 May the effusion rate increased and the L5 lava flow advanced. A new lava flow (L6) emerged on 5 May from the summit crater and descended 100 m down the NE flank. A high-temperature elongated deposit in between the L5 and L6 flows was visible in infrared images. The Alert Level remained at Yellow, the second lowest level on a four-colour scale. ONEMI stated that Alert Level Yellow (the middle level on a three-colour scale) remained in place for the communities of Pinto and Coihueco, noting that the public should stay at least 2 km away from the crater.
Piton de la Fournaise – Reunion Island (France) : OVPF reported that the eruption at Piton de la Fournaise continued during 4-11 May. Both craters were active, producing lava flows that mainly traveled though lava tubes. Lava emerged from the end of the flow field, advancing E to 1,200 m elevation by 8 May, and setting fire to local vegetation. Minor inflation of the summit area was recorded. Lava fountaining was weak at the smaller vent to the SE and a small lava pond continued to occupy the crater of the larger cone, just NW a higher elevation. Gas plumes rose from both craters, though the plumes from the smaller crater were denser. An 11 May report stated that the larger cone was 35 m tall and 226 m in diameter at its base. The Alert Level remained at 2-2.
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