The Global Volcanism Program has no activity reports available for Longonot.
The Global Volcanism Program has no Weekly Reports available for Longonot.
The Global Volcanism Program has no Bulletin Reports available for Longonot.
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.
Synonyms |
| Ol Olongot | Olonongot |
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There is data available for 3 confirmed Holocene eruptive periods.
1863 ± 5 years Confirmed Eruption VEI: 0
| Episode 1 | Eruption | Northern flank | |||||||||||||||||||
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| 1863 ± 5 years - Unknown | Evidence from Correlation: Anthropology | |||||||||||||||||||
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List of 2 Events for Episode 1 at Northern flank
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1330 BCE ± 100 years Confirmed Eruption
| Episode 1 | Eruption | |||||||||||||||
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| 1330 BCE ± 100 years - Unknown | Evidence from Isotopic: 14C (uncalibrated) | ||||||||||||||
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List of 1 Events for Episode 1
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7200 BCE ± 100 years Confirmed Eruption
| Episode 1 | Eruption | ||||||||||||||||||||
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| 7200 BCE ± 100 years - Unknown | Evidence from Isotopic: 14C (uncalibrated) | |||||||||||||||||||
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List of 2 Events for Episode 1
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There is data available for 1 deformation periods. Expand each entry for additional details.
| Start Date: 2004 Jun 28 | Stop Date: 2006 Mar 20 | Direction: Uplift | Method: InSAR |
| Magnitude: 9.000 cm | Spatial Extent: Unknown | Latitude: Unknown | Longitude: Unknown |
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Longonot in 2003?2006 (stack of seven interferograms). Each fringe (blue-red cycle) represents 2.8 cm of displacement in the satellite line of sight. From: Biggs et al. 2009a. |
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Reference List: Biggs et al. 2009a.
Full References:
Biggs J, Amelung F, Gourmelen N, Dixon T, 2009. InSAR Observations of 2007 Tanzania Rifting Episode Reveals Mixed Fault and Dyke Extension in an Immature Continental Rift. Geophysical Journal International. https://doi.org/10.1111/j.1365-246X.2009.04262.x
There is no Emissions History data available for Longonot.
The central cone of Longonot volcano was constructed within a large, topographically indistinct caldera. The summit of Longonot, seen here from the north, is the west rim of a 1.8-km-wide summit caldera. Late-stage lava flows were erupted on the northern and SW flanks. 
The trachytic Longonot stratovolcano SE of Lake Naivasha contains an 8 x 12 km caldera. A large central cone, seen here from the SW, was constructed within the caldera and forms the summit of the volcano. It is truncated by a circular, 1.8-km-wide caldera. Post-caldera lavas erupted onto its floor give it a flat surface. Masai tradition records a lava flow on the northern flank during the 19th century. Similarly youthful-looking lava flows occur on the SW flank. 
The central cone of Longonot volcano is truncated by a small steep-walled caldera that is 1.8-km wide. Erosionally furrowed ash deposits related to the caldera-forming eruptions mantle its slopes. Trachytic lava flows up to 30-m thick that built the central cone can be seen in the far west caldera wall. The caldera floor is covered by post-collapse aa lava flows . A line of small craters extends from the SW wall to the center.
The small summit caldera of Longonot volcano is seen here from the NNE. A circular crater tops a symmetrical cone erupted along a N-S fissure on the upper flanks of Longonot. Fissures lower on the north flank produced the youngest eruption of the volcano during the 19th century. 
Longonot as seen from the flanks of Suswa volcano (SSW of Longonot) in the Eastern Rift Valley of Kenya. The modern cone was constructed within a broad 8 x 12 km caldera and itself contains a smaller 1.8-km-wide summit crater that gives the summit a flat profile. Post-caldera lavas are found on the caldera floor and on the flanks. Masai tradition records a lava flow on the N flank during the 19th century.Maps are not currently available due to technical issues.
There are no samples for Longonot in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.
| Copernicus Browser | The Copernicus Browser replaced the Sentinel Hub Playground browser in 2023, to provide access to Earth observation archives from the Copernicus Data Space Ecosystem, the main distribution platform for data from the EU Copernicus missions. |
| 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. |
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WOVOdat
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.
GVMID Data on Volcano Monitoring Infrastructure The Global Volcano Monitoring Infrastructure Database GVMID, is aimed at documenting and improving capabilities of volcano monitoring from the ground and space. GVMID should provide a snapshot and baseline view of the techniques and instrumentation that are in place at various volcanoes, which can be use by volcano observatories as reference to setup new monitoring system or improving networks at a specific volcano. These data will allow identification of what monitoring gaps exist, which can be then targeted by remote sensing infrastructure and future instrument deployments. |
| Volcanic Hazard Maps | The IAVCEI Commission on Volcanic Hazards and Risk has a Volcanic Hazard Maps database designed to serve as a resource for hazard mappers (or other interested parties) to explore how common issues in hazard map development have been addressed at different volcanoes, in different countries, for different hazards, and for different intended audiences. In addition to the comprehensive, searchable Volcanic Hazard Maps Database, this website contains information about diversity of volcanic hazard maps, illustrated using examples from the database. This site is for educational purposes related to volcanic hazard maps. Hazard maps found on this website should not be used for emergency purposes. For the most recent, official hazard map for a particular volcano, please seek out the proper institutional authorities on the matter. |
| IRIS seismic stations/networks | Incorporated Research Institutions for Seismology (IRIS) Data Services map showing the location of seismic stations from all available networks (permanent or temporary) within a radius of 0.18° (about 20 km at mid-latitudes) from the given location of Longonot. Users can customize a variety of filters and options in the left panel. Note that if there are no stations are known the map will default to show the entire world with a "No data matched request" error notice. |
| UNAVCO GPS/GNSS stations | Geodetic Data Services map from UNAVCO showing the location of GPS/GNSS stations from all available networks (permanent or temporary) within a radius of 20 km from the given location of Longonot. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player. |
| DECADE Data | The DECADE portal, still in the developmental stage, serves as an example of the proposed interoperability between The Smithsonian Institution's Global Volcanism Program, the Mapping Gas Emissions (MaGa) Database, and the EarthChem Geochemical Portal. The Deep Earth Carbon Degassing (DECADE) initiative seeks to use new and established technologies to determine accurate global fluxes of volcanic CO2 to the atmosphere, but installing CO2 monitoring networks on 20 of the world's 150 most actively degassing volcanoes. The group uses related laboratory-based studies (direct gas sampling and analysis, melt inclusions) to provide new data for direct degassing of deep earth carbon to the atmosphere. |
| Large Eruptions of Longonot | 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). |
| 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). |
