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Emissions from Anatahan
| Title |
Emissions from Anatahan |
| Description |
On March 17, 2007, the Anatahan Volcano, in the Northern Mariana Islands, released a plume of ash and/or steam. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] flying onboard the Aqua [ http://aqua.nasa.gov ] satellite captured this image on March 18, 2007, as the volcano's emissions continued. In this image, the volcanic plume pushes toward the southeast then changes direction slightly and aims for the islands of Saipan and Tinian. The volcanic plume is a little darker and more diffuse in shape than the nearby opaque white clouds. Volcanic emissions of sulfur dioxide sometimes react with water and sunlight to create vog—a haze that hangs over the region. Previous eruptions of Anatahan have created substantial vog. [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12832 ] Although the chemical composition of the plume cannot be identified from a single picture, south of Saipan and Tinian, the plume takes on an extra-hazy appearance consistent with volcanic fog. The same day MODIS acquired this image, the U.S. Air Force Weather Agency reported an odor of sulfur (which would also suggest the presence of vog) on Guam, approximately 200 kilometers southwest of Saipan.Anatahan [ http://www.volcano.si.edu/world/volcano.cfm?vnum=0804-20= ] is a stratovolcano composed of alternating layers of hardened lava, ash, and rock. Its first recorded eruption [ http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=15288 ] occurred in May 2003. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The MODIS Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?Anatahan ] of Anatahan. |
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Eruption of Anatahan
| Title |
Eruption of Anatahan |
| Description |
Ash rained down on Saipan, the main island in the chain of islands that make up the Northern Mariana Islands, and its neighbor Tinian on April 6, 2005. The sky over the islands darkened when the Anatahan volcano exploded late on April 5, and nearly 12 hours later, when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Aqua [ http://aqua.nasa.gov/ ] satellite captured this image, the islands were still completely obscured by a brown cloud of ash. No one was injured in the eruption, but residents have been warned to remain indoors and avoid drinking ash-contaminated water. The fourteen islands of the Northern Mariana Islands, including Anatahan, form a U.S. territory. Sitting 320 kilometers south of the volcano, Guam (a separately administered U.S. Territory) does not appear to have been affected by the ash. The Anatahan volcano itself is actually two volcanoes with overlapping summit calderas. The volcano forms the tiny island of Anatahan, which measures 9 kilometers long by 3 kilometers wide. The larger of the two peaks rises 788 meters from the surface of the sea, while the smaller peak is just 68 meters above sea level. The volcano's first recorded eruption was in May 2003. The April 5 eruption is the largest the volcano has produced since May 2003. NASA image courtesy Liam Gumley, University of Wisconsin-Madison, made from data provided by NOAA/NESDIS. |
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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 known—by 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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First Recorded Eruption of A
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| 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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Emissions from Anatahan: Nat
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nasa, nasanaturalhazards
On March 17, 2007, the Anata
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anatahan_amo_2007077
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-03-18 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
anatahan_amo_2007077 |
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Eruption of Anatahan: Natura
…
nasa, nasanaturalhazards
As reported by the Saipan Tr
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anatahan_omi_2005220
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-08-08 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
anatahan_omi_2005220 |
|
Eruption of Anatahan: Natura
…
nasa, nasanaturalhazards
Ash rained down on Saipan, t
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Anatahan_AMO_2005096
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-04-06 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
Anatahan_AMO_2005096 |
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First Recorded Eruption of A
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nasa, nasaimageofthedaygalle
…
It is sleep time on the Inte
…
ISS007-E-5366
| mediatype |
IMAGE |
| mediatype |
image |
| date |
1996-05-11 |
| creator |
NASA -- Astronaut photograph eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS007&roll=E&frame=5366 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 eol.jsc.nasa.gov/ Gateway to Astronaut Photography of Earth. |
| identifier |
ISS007-E-5366 |
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First Recorded Eruption of A
…
nasa, nasaimageofthedaygalle
…
It is sleep time on the Inte
…
ISS007-E-5366
| mediatype |
IMAGE |
| mediatype |
image |
| date |
1996-05-11 |
| creator |
NASA -- Astronaut photograph eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS007&roll=E&frame=5366 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 eol.jsc.nasa.gov/ Gateway to Astronaut Photography of Earth. |
| identifier |
ISS007-E-5366 |
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Typhoon Longwang: Natural Ha
…
nasa, nasanaturalhazards
Typhoon Longwang was a small
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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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