- Info & Contacts
The Global Volcanism Program has no activity reports for Rishirizan.
The Global Volcanism Program has no Weekly Reports available for Rishirizan.
The Global Volcanism Program has no Bulletin Reports available for Rishirizan.
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.
|Risiri | Rishiri|
There is data available for 1 Holocene eruptive periods.
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|5830 BCE ± 300 years||Unknown||Confirmed||Radiocarbon (uncorrected)||Rs-Ho tephra|
There is no Deformation History data available for Rishirizan.
There is no Emissions History data available for Rishirizan.
|Rishiri is a highly dissected andesitic stratovolcano that forms an island west of the northern tip of Hokkaido. The main edifice ceased erupting during the Pleistocene, and extensive erosion has created a rugged dissected summit flanked by radial knife-edged ridges. Scoria cones and maars on the lower flanks have been active during the late Pleistocene and early Holocene.
Photo by Yoshihiro Ishizuka, 1997 (Hokkaido University).
|Rishiri volcano is a highly dissected stratovolcano that forms an island off the NW tip of Hokkaido. The composite cone (center) and flank scoria cones (middle ground) are mirrored on the surface of a maar on the lower south flank. The stratovolcano was constructed during the Pleistocene. Scoria cones and maars on the lower flanks erupted 30,000-8,000 years ago.
Photo by Yoshihiro Ishizuka, 1993 (Hokkaido University).
The following 1 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.
|Catalog Number||Sample Description||Lava Source||Collection Date|
Single Volcano View
Temporal Evolution of Unrest
Side by Side Volcanoes
|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.|
|Large Eruptions of Rishirizan||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).|
|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.|
|MODVOLC Thermal Alerts||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.|
|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).|