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DTSTART;VALUE=DATE:20221216
DTEND;VALUE=DATE:20251217
DTSTAMP:20260606T144648
CREATED:20231122T141648Z
LAST-MODIFIED:20231122T141731Z
UID:99037-1671148800-1765929599@www.a3veen.nl
SUMMARY:Surface Water and Ocean Topography (SWOT) mission
DESCRIPTION:The Surface Water and Ocean Topography (SWOT) mission is a satellite altimeter jointly developed and operated by NASA and CNES\, the French space agency\, in partnership with the Canadian Space Agency (CSA) and UK Space Agency (UKSA). \nThe objectives of the mission are to make the first global survey of the Earth’s surface water\, to observe the fine details of the ocean surface topography\, and to measure how terrestrial surface water bodies change over time. While past satellite missions like the Jason series altimeters (TOPEX/Poseidon\, Jason-1\, Jason-2\, Jason-3) have provided variation in river and lake water surface elevations at select locations\, SWOT will provide the first truly global observations of changing water levels\, stream slopes\, and inundation extents in rivers\, lakes\, and floodplains. In the world’s oceans\, SWOT will observe ocean circulation at unprecedented scales of 15–25 km (9.3–15.5 mi)\, approximately an order of magnitude finer than current satellites. Because it uses wide-swath altimetry technology\, SWOT will almost completely observe the world’s oceans and freshwater bodies with repeated high-resolution elevation measurements\, allowing observations of variations. \nLinks:\nSurface Water and Ocean Topography at NASA.gov \nOcean Surface Topography from Space at NASA.gov \nCnes project Library at CNES.fr \nAVISO+ portal for SWOT
URL:https://www.a3veen.nl/event/surface-water-and-ocean-topography-swot-mission/
CATEGORIES:Astronomie,Geografie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250313
DTEND;VALUE=DATE:20250708
DTSTAMP:20260606T144648
CREATED:20250313T203355Z
LAST-MODIFIED:20250707T154907Z
UID:127020-1741824000-1751932799@www.a3veen.nl
SUMMARY:Mount Lewotobi Laki-laki - eruptions June / July 2025
DESCRIPTION:Lewotobi is a twin volcano located in the southeastern part of the island of Flores\, Indonesia\, it has two peaks; the Lewotobi Laki-laki (Male Lewotobi) and Lewotobi Perempuan (Female Lewotobi) stratovolcanoes\, the more active Lewotobi Laki-laki is about 2.1 km northwest of the taller Lewotobi Perempuan. \nOn 21 March\, Lewotobi Laki-laki erupted\, sending ash clouds over 8 km high. Authorities raised the alert to the highest level\, and Jetstar canceled some flights to Bali. The eruption followed smaller ones since 13 March. One person was injured during the evacuations\, although the details reported were unclear. Bali airport remained open\, but seven international flights were canceled. The geological agency warned of lava floods and continued activity. Lewotobi Laki-laki erupted again on 18 May\, prompting authorities to raise Indonesia’s highest volcanic alert level. Lewotobi Laki-laki erupted on 17 June\, sending ash clouds 11 km high\, prompting authorities to raise Indonesia’s highest volcanic alert level again\, with a plume visible from a distance of 90 km to 150 km. Multiple flights were cancelled due to the amount volcanic ash released into the atmosphere. Two major eruptions occurred on 7 July\, ejecting debris as far as 8 km away and producing pyroclastic flows that reached 5 km from the crater and an ash cloud 13 km high. At least 24 flights were cancelled in Bali. \nLinks:\nIndonesia’s Mount Lewotobi Laki-laki spews 11 kilometre high ash cloud after eruption \nAlert raised to the highest level after Indonesia’s Mount Lewotobi Laki Laki volcano erupts \nIndonesia volcano spews ash more than 6 miles into sky\, dozens of Bali flights canceled \nLewotobi – Pusat Vulkanologi dan Mitigasi Bencana Geologi
URL:https://www.a3veen.nl/event/mount-lewotobi-laki-laki-eruption-june-2025/
LOCATION:Indonesie\, Indonesia
CATEGORIES:Geografie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250528
DTEND;VALUE=DATE:20250529
DTSTAMP:20260606T144648
CREATED:20250528T093147Z
LAST-MODIFIED:20250530T102743Z
UID:126123-1748390400-1748476799@www.a3veen.nl
SUMMARY:Neerstorten van de Birchgletsjer bij Blatten
DESCRIPTION:Op 28 mei 2025 werd Blatten\, een gemeente en plaats in het Lötschental aan de oevers van Lonza\, in het Zwitserse kanton Wallis\, samen met de omliggende dalbodem voor 90% bedolven door een ijs- en steenlawine van 3 miljoen kubieke meter en nadien ontstond op de dalbodem stroomopwaarts een natuurlijk stuwmeer dat daar overgebleven huizen overstroomde. \nDe lawine bestond uit het omlaagstorten van een groot deel van de Birchgletsjer ten zuiden van het dorp\, die door het afbrokkelen van grote hoeveelheden puin van de hogergelegen top Kleines Nesthorn (3342 meter) instabiel geworden was. Vele huizen werden bedolven en verwoest. De bewoners waren al een week eerder geëvacueerd wegens het gevaar voor een rotslawine. Of het deels afbrokkelen van de Kleines Nesthorn de stijging van de permafrost\, door klimaatverandering\, als oorzaak heeft\, is nog niet bevestigd. \nLinks:\nZwitsers Alpendorp bijna volledig bedolven na instorting bergwand \nBergsturz Blatten – ticker SRF
URL:https://www.a3veen.nl/event/neerstorten-van-de-birchgletsjer-bij-blatten/
LOCATION:Zwitserland\, Switzerland
CATEGORIES:Geografie,Klimaat
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