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Ukraine airspace closed due to Russia invasion

on February 25, 2022

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TOKYO VAAC

Early detection of volcanic eruptions is crucial for VAAC operations. Volcanic activities in Japan are monitored by four JMA Volcanic Observation and Warning Centers located in Sapporo, Sendai, Tokyo and Fukuoka. The Tokyo VAAC receives volcanic activity reports from these centers when eruptions or explosions occur in domestically volcanoes. The Tokyo VAAC also receives information on volcanic activities outside Japan from the MWOs within its area of responsibility and relevant organizations such as the Kamchatka Volcanic Eruption Response Team (KVERT), the Philippine Institute of Volcanology and Seismology (PHIVOLCS), the Alaska Volcano Observatory (AVO) and adjacent VAACs. Volcanic eruption reports from pilots from cruising airplanes as well as satellite imagery from the geostationary meteorological satellite and the polar-orbiting satellite are also important sources of information. Links to TYOKYO VAAC volcano map page Links to TYOKYO VAAC latest volcanic ash ad

AWC SIGWX Charts

SIGWX SIGWX North and South America America Europe Africa North Pacific South Pacific North Pole Atlantic North Pole Pacific South Pole Pacific

Symbols of SIGWX(Significant Weather) Chart

SIGWX charts are valid at 0000Z, 0600Z, 1200Z, and 1800Z. From FL250 to FL630 is SIGWX High (SWH), from FL100 to FL250 is SIGWX Medium (SWM). Including significant en-route weather phenomena and associated surface weather features. The significant weather elements : Tropopause high Tropopause low Tropopause level Thunderstorms and cumulonimbus clouds Jetstream(at FL350, wind speed at the jet core 200kt, Depth: FL170-FL580) Turbulence(moderate to severe turbulence from below the layer of the chart to FL440) Volcanic eruption 20kt change in jetstream wind speed Tropical storm, Typhoon, Hurricane Moderate aircraft icing Severre aircraft icing

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Ukraine airspace closed due to Russia invasion

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