- Info & Contacts
The Global Volcanism Program has no activity reports for Harrat ar Rahah.
The Global Volcanism Program has no Weekly Reports available for Harrat ar Rahah.
The Global Volcanism Program has no Bulletin Reports available for Harrat ar Rahah.
The Global Volcanism Program is not aware of any Holocene eruptions from Harrat ar Rahah. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Harrat ar Rahah page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
|Raha, Harrat er-|
|The large dark wedge-shaped area pointing to the lower right near the center of this Space Shuttle image is Harrat 'Uwayrid, a major volcanic field in NW Saudi Arabia. Harrat 'Uwayrid lies on the Bedouin pilgrim route to Syria and contains young basaltic scoria and tuff cones. Bedouin legends say that Hala-'l-Bedr erupted fire and stones in 640 AD, killing herdsmen and their cattle and sheep. Another volcanic field, Harrat ar Rahah (upper left), lies to the NW, left of the small light-colored desert area at the upper left-center.
NASA Space Shuttle image STS37-152-84, 1991 (http://eol.jsc.nasa.gov/).
|The darker-colored area extending diagonally to the right down the center of this Space Shuttle image is Harrat ar Rahah, the northernmost of a series of Quaternary volcanic fields paralleling the Red Sea coast of Saudi Arabia. The geometrical outlines of the historical town of Tabuk (top-center), located on the road leading from Hijr to Damascus, can be seen to the north. There are fewer young volcanoes in Harrat ar Rahah than in other harrats (lava fields) to the south.
NASA Space Shuttle image STS37-152-177, 1991 (http://eol.jsc.nasa.gov/).
A listing of samples from the Smithsonian collections will be available soon.
|Large Eruptions of Harrat ar Rahah||Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).|
|WOVOdat||WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.|
|EarthChem||EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).|
|MODVOLC - HIGP MODIS Thermal Alert System||Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.|
|MIROVA||Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.|