Nicht nur Asche: Kondensierender Wasserdampf, vorher gasförmig aus dem Krater entwichen, zeigt, wie der Wind die heißen aufsteigenden Gase zu der typischen Vulkanfahne verweht. Hier der Vulkan Soufrière Hills auf Montserrat.
English: This oblique astronaut photograph from the International Space Station (ISS) captures a white-to-grey ash and steam plume extending westwards from the volcano. Oblique images are taken by astronauts looking out from the ISS at an angle, rather than looking straight downward toward the Earth (a perspective called a nadir view), as is common with most remotely sensed data from satellites. An oblique view gives the scene a more three-dimension quality, and provides a look at the vertical structure of the volcanic plume. While much of the island is covered in green vegetation, grey deposits that include pyroclastic flows and volcanic mud-flows (lahars) are visible extending from the volcano toward the coastline. When compared to its extent in earlier views, the volcanic debris has filled in more of the eastern coastline. Urban areas are visible in the northern and western portions of the island; they are recognizable by linear street patterns and the presence of bright building rooftops. The silver-grey appearance of the Caribbean Sea surface is due to sun-glint, which is the mirror-like reflection of sunlight off the water surface back towards the hand-held camera on-board the ISS. The sun-glint highlights surface wave patterns around the island. ISS Crew Earth Observations: ISS021-E-5555 Identification Mission ISS021 (Expedition 21) Roll E Frame 5555 Country or Geographic Name LESSER ANTILLES Features MONTSERRAT I., SOUFRIERE HILLS VOLCANO, PLUME, SUNGLINT Center Point Latitude 16.7° N Center Point Longitude -62.2° E Camera Camera Tilt 32° Camera Focal Length 400 mm Camera Nikon D2Xs Film 4288 x 2848 pixel CMOS sensor, RGBG imager color filter. Quality Percentage of Cloud Cover 0-10% Nadir What is Nadir? Date 2009-10-11 Time 18:16:09 Nadir Point Latitude 17.3° N Nadir Point Longitude -60.4° E Nadir to Photo Center Direction West Sun Azimuth 239° Spacecraft Altitude 183 nautical miles (339 km) Sun Elevation Angle 46° Orbit Number 2431 Original image caption Ash and Steam Plume, Soufrière Hills Volcano, Montserrat The Soufrière Hills, a volcano on the island of Montserrat, in the Lesser Antilles island chain in the Caribbean Sea, has been active since 1995. The most recent eruptive phase of the volcano began with a short swarm of volcano-tectonic earthquakes—earthquakes thought to be caused by movement of magma beneath a volcano—on October 4, 2009, followed by a series of ash-venting events that have continued through October 13, 2009. These venting events create plumes that can deposit ash at significant distances from the volcano. In addition to ash plumes, pyroclastic flows and lava dome growth have been reported as part of the current eruptive activity. This oblique astronaut photograph from the International Space Station (ISS) captures a white-to-gray ash and steam plume extending westwards from the volcano on October 11, 2009. Oblique images are taken by astronauts looking out from the ISS at an angle, rather than looking straight downward toward the Earth (a perspective called a nadir view), as is common with most remotely sensed data from satellites. An oblique view gives the scene a more three-dimension quality, and provides a look at the vertical structure of the volcanic plume. While much of the island is covered in green vegetation, gray deposits that include pyroclastic flows and volcanic mudflows (lahars) are visible extending from the volcano toward the coastline. When compared to its extent in earlier views, the volcanic debris has filled in more of the eastern coastline. Urban areas are visible in the northern and western portions of the island; they are recognizable by linear street patterns and the presence of bright building rooftops. The silver-gray appearance of the Caribbean Sea surface is due to sunglint, which is the mirror-like reflection of sunlight off the water surface back towards the handheld camera onboard the ISS. The sunglint highlights surface wave patterns around the island.