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Eruption of Anatahan
| Title |
Eruption of Anatahan |
| Description |
As reported by the Saipan Tribune Website, the Anatan Volcano spewed volcanic ash to an altitude of nearly 13,000 meters (42,000 feet) in early August, prompting officials to issue a volcanic ash advisory for Saipan and Tinian in the Northern Mariana Islands. The volcano has emitted something besides ash: sulfur dioxide. Sulfur dioxide is colorless, so its presence must be monitored with sensors specially designed to find it. The Ozone Monitoring Instrument (OMI) on NASA's Aura [ http://aura.gsfc.nasa.gov/index.html ] satellite collects data on atmospheric chemistry. OMI monitors sulfur dioxide emissions from Anatahan, and collected data shown in these images between July 25 and 31 (top), and August 2 and 8 (bottom). Highest concentrations appear in red, and lowest concentrations appear in pale pink. In each image, the arrow indicates the volcano's summit. OMI measures sulfur dioxide in terms of molecules per square centimeter of atmosphere, known as Dobson Units. A single Dobson Unit equals 0.0285 grams of sulfur dioxide per square meter of vertical column of atmosphere. The images show different dispersion patters for sulfur dioxide in late July and early August. Between July 25 and 31, predominantly easterly winds carried the noxious emissions away from the populated islands. Between August 2 and 8, however, changing winds allowed sulfur dioxide to accumulate over the Southern Mariana Islands and Guam. Although invisible to human eyes, sulfur dioxide can still make its presence knownby irritating them. Sulfur dioxide can inflame mucous membranes of the eyes, nose, and throat, and even skin. The upper respiratory tract is the most susceptible to sulfur dioxide irritation. Sulfur dioxide also leads to acid rain and volcanic smog (vog) that interferes with air transport. The OMI instrument is a Dutch-Finnish Instrument, provided to the EOS/Aura mission by The Netherlands and Finland. NIVR (the Dutch space agency) is the overall program manager, in coordination with FMI (the Finnish Meteorological Institute). The Royal Netherlands Meteorological Institute (KNMI) is the Principal Investigator institute. NASA image courtesy Simon Carn, Joint Center for Earth Systems Technology [ http://www.jcet.umbc.edu/ ] (JCET), University of Maryland Baltimore County (UMBC) |
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Super Typhoon Nabi
| Title |
Super Typhoon Nabi |
| Description |
Super Typhoon Nabi was a Category 3 typhoon in the western Pacific when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Aqua [ http://aqua.nasa.gov/ ] satellite captured this image on September 2, 2005, at 11:55 a.m. Tokyo time. It had sustained winds of around 200 kilometers an hour (160 miles per hour) and was located roughly 1,000 kilometers (600 miles) from Saipan and Okinawa at that time. It was predicted to gather strength and make landfall at the southern end of the Korean peninsula early on September 7. However, the range of possible storm tracks as of September 2 takes in possibilities ranging from Shanghai on Asian mainland to Kyoto on the southern end of the Japanese Islands. NASA image created by Jesse Allen, Earth Observatory, using data obtained from the MODIS Rapid Response team. |
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First Recorded Eruption of A
…
| Title |
First Recorded Eruption of Anatahan Volcano |
| Description |
high resolution 1000 pixel-wide image (690 KB JPEG) It is sleep-time on the International Space Station, and astronaut Ed Lu is supposed to be asleep. He is looking out the window and admiring the Pacific Ocean below. Suddenly he realizes something is strange. A huge yellowish-brown plume is sweeping across hundreds of miles of ocean. A major volcanic eruption is in progress?he grabs a camera and shoots. Space Station crewmembers receive a daily list of photographic targets that include areas of scientific interest and dynamic events. In this case, though, the crew observed the eruption before news had spread to the international media or to the networks that track volcanic events worldwide. Ed checked with NASA Cap Com to find out whether it really was a volcano and precisely where the eruption was occurring. The eruption was from the volcano on Anatahan Island, which is located 80 miles north of Saipan and is part of the Northern Mariana Island Chain. This small island, 6 miles long by 2 miles wide, has been uninhabited since 1990 when residents were evacuated because of a strong earthquake. The lower photograph shows how Anatahan looked from the Space Shuttle in 1996 (photo STS080-708-28) On the night of May 10, the Anatahan Volcano announced itself with a vigorous eruption that sent high-level ash over a wide area. About 12 hours later, on May 11 at 00:19 GMT, the crew of the International Space Station observed and photographed this ash plume, describing it as huge. By May 15 a state of emergency had been declared in the Northern Mariana Islands as the eruption appeared to be intensifying. Astronaut photograph ISS007-E-5366 was provided by the Earth Sciences and Image Analysis Laboratory at Johnson Space Center. Additional images taken by astronauts and cosmonauts can be viewed at the NASA-JSC Gateway to Astronaut Photography of Earth. |
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First Recorded Eruption of A
…
| Title |
First Recorded Eruption of Anatahan Volcano |
| Description |
high resolution 1000 pixel-wide image (690 KB JPEG) It is sleep-time on the International Space Station, and astronaut Ed Lu is supposed to be asleep. He is looking out the window and admiring the Pacific Ocean below. Suddenly he realizes something is strange. A huge yellowish-brown plume is sweeping across hundreds of miles of ocean. A major volcanic eruption is in progress?he grabs a camera and shoots. Space Station crewmembers receive a daily list of photographic targets that include areas of scientific interest and dynamic events. In this case, though, the crew observed the eruption before news had spread to the international media or to the networks that track volcanic events worldwide. Ed checked with NASA Cap Com to find out whether it really was a volcano and precisely where the eruption was occurring. The eruption was from the volcano on Anatahan Island, which is located 80 miles north of Saipan and is part of the Northern Mariana Island Chain. This small island, 6 miles long by 2 miles wide, has been uninhabited since 1990 when residents were evacuated because of a strong earthquake. The lower photograph shows how Anatahan looked from the Space Shuttle in 1996 (photo STS080-708-28) On the night of May 10, the Anatahan Volcano announced itself with a vigorous eruption that sent high-level ash over a wide area. About 12 hours later, on May 11 at 00:19 GMT, the crew of the International Space Station observed and photographed this ash plume, describing it as huge. By May 15 a state of emergency had been declared in the Northern Mariana Islands as the eruption appeared to be intensifying. Astronaut photograph ISS007-E-5366 was provided by the Earth Sciences and Image Analysis Laboratory at Johnson Space Center. Additional images taken by astronauts and cosmonauts can be viewed at the NASA-JSC Gateway to Astronaut Photography of Earth. |
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Typhoon Longwang
| Title |
Typhoon Longwang |
| Description |
Typhoon Longwang was a small but well-organized and powerful storm system when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Aqua [ http://aqua.nasa.gov/ ] satellite captured this image at 12:50 p.m. local time, on September 27, 2005. At the time of this MODIS observation, Longwang was 1,000 kilometers (600 miles) from Saipan in the Northern Mariana Islands, and well away from any significant land mass. It was travelling roughly westward towards the Chinese coast on a track that would take it through the southern fringe of the Japanese islands. Typhoon Longwang had sustained winds of 180 kilometers per hour (115 miles per hour) near the storm's center, and it was projected to become significantly stronger in the following days. NASA image created by Jesse Allen, Earth Observatory, using data courtesy of the MODIS Rapid Response team. |
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Super Typhoon Nabi: Natural
…
nasa, nasanaturalhazards
Super Typhoon Nabi was a Cat
…
nabi_amo_02sep05
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-09-02 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
nabi_amo_02sep05 |
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Eruption of Anatahan: Natura
…
nasa, nasanaturalhazards
As reported by the Saipan Tr
…
anatahan_omi_2005220
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-08-08 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
anatahan_omi_2005220 |
|
Typhoon Longwang: Natural Ha
…
nasa, nasanaturalhazards
Typhoon Longwang was a small
…
longwang_amo_27sep05
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-09-27 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
longwang_amo_27sep05 |
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