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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 36.671°N
  • 27.14°E

  • 180 m
    590 ft

  • 212051
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Yali.

The Global Volcanism Program has no Weekly Reports available for Yali.

The Global Volcanism Program has no Bulletin Reports available for Yali.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

180 m / 590 ft


Volcano Types

Lava dome(s)

Rock Types


Tectonic Setting

Subduction zone
Continental crust (> 25 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

Yali, a small island between the northern coast of Nisyros Island and the SW coast of Kos Island, consists of rhyolitic obsidian domes and pumice deposits. Yali is located within the inferred location of the large submarine caldera associated with the eruption of the voluminous Kos Plateau Tuff, dated about 160,000 years before present. This eruption produced extensive ignimbrites that blanket much of the western half of the island of Kos and produced a caldera whose dimensions are uncertain, but which may extend from Kefalos Bay on the SW side of Kos Island to Nisyros Island, south of Yali. The crescent-shaped island of Yali is oriented NNE-SSW and contains two distinct segments connected by a narrow isthmus formed of modern reef sediments. The SW part of the island consists primarily of a layered pumice-fall unit about 200 m thick, and the NE part contains rhyolitic obsidian lava flows of similar thickness. No historical eruptions are known from Yali, but the most recent pumice eruptions of Yali overlie soils containing pottery and Neolithic obsidian artifacts (Keller, 1982).


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Allen S R, Cas R A F, 1998. Lateral variations within coarse co-ignimbrite lithic breccias of the Kos Plateau Tuff, Greece. Bull Volc, 59: 356-377.

Allen S R, Cas R A F, 2001. Transport of pyroclastic flows across the sea during the explosive, rhyolitic eruption of the Kos Plateau Tuff, Greece. Bull Volc, 62: 441-456.

Allen S R, McPhie J, 2001. Syn-eruptive chaotic breccia on Kos, Greece, associated with an energetic pyroclastic flow. Bull Volc, 63: 421-432.

Di Paola G M, 1974. Volcanology and Petrology of Nisyros Island (Dodecanese, Greece). Bull Volc, 38: 944-987.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Keller J, 1980. The island of Vulcano. Soc Italiana Min Petr, 36: 368-413.

Keller J, 1982. Mediterranean Island Arcs. In: Thorpe R S (ed) {Andesites}, New York: John Wiley Sons, p 307-326.

Keller J, Rehren T, Stadlbauer E, 1990. Explosive volcanism in the Hellenic arc: a summary and review. In: Hardy D (ed) {Thera and the Aegean World III}, London: Thera Foundation, 2: 13-26.

The Global Volcanism Program is not aware of any Holocene eruptions from Yali. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Yali 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.


Jali | Yiali | Jalli

Photo Gallery

The crescent-shaped island of Yali (upper left) lies above and to the left of Nisyros Island (lower right) in this NASA Space Shuttle image (with north to the upper left). Yali contains two distinct segments connected by a narrow isthmus formed of modern reef sediments and consists of rhyolitic obsidian domes at the NE end and pumice-fall deposits at the SW end. A 3-4 km wide caldera, much of the western side of which is filled by post collapse lava domes, is visible on historically active Nisyros Island.

NASA Space Shuttle image ISS006-E-30975, 2003 (http://eol.jsc.nasa.gov/).

Smithsonian Sample Collections Database

There are no samples for Yali in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

Large Eruptions of Yali 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.