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Harrat Rahat

Rahat, Harrat

Campo vulcanico · Saudi Arabia · 1744 m

The northern part of Saudi Arabia's largest lava field, 20,000 km2 Harrat Rahat, is seen in this NASA International Space Station image (N to the top left). Harrat Rahat extends for 300 km S of the city of Madinah (Medina), the light-colored area at the top-center. Although basaltic scoria cones are more common, small shield volcanoes and lava domes are also present. The most well-known eruption took place in 1256 CE, when the large dark-colored flow seen extending to the upper right traveled 23 km to within 4 km of Madinah.
The northern part of Saudi Arabia's largest lava field, 20,000 km2 Harrat Rahat, is seen in this NASA International Space Station image (N to the top left). Harrat Rahat extends for 300 km S of the city of Madinah (Medina), the light-colored area at the top-center. Although basaltic scoria cones are more common, small shield volcanoes and lava domes are also present. The most well-known eruption took place in 1256 CE, when the large dark-colored flow seen extending to the upper right traveled 23 km to within 4 km of Madinah. · Foto: NASA International Space Station image ISS001-344-27, 2001 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
Tipo
Campo vulcanico
Paese
Saudi Arabia
Regione
Arabia e Asia centrale / Western Arabia Volcanic Province
Altitudine
1744 m
Coordinate
23.080, 39.780
Ultima eruzione
1256
Contesto tettonico
Intraplate / Continental crust (> 25 km)
Forma vulcanica
Cluster
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Harrat Rahat, Saudi Arabia's largest lava field, covers 20,000 km2 and extends for 300 km S of Madinah (Medina). Four coalescing lava fields erupted from offset NNW-trending vent systems comprise the field, which has an average width of 60 km. Lava flows extend as far as 100 km W of the axis of the field. Basaltic scoria cones dominate, but the volcanic field has also produced silicic trachy-basaltic to trachytic rocks. Small shield volcanoes and lava domes with associated pyroclastic flow and surge deposits are also present. Activity has migrated to the north over time, resulting in eruptions near Madinah. The best-known eruption took place in 1256 CE, when a 0.5 km3 lava flow erupted from six aligned scoria cones and traveled 23 km to within 4 km of Madinah.

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
641~706 · 1 eruzioni · VEI max. 21227~1292 · 2 eruzioni · VEI max. 364177196710971227

Cronologia dettagliata

  1. 1292VEI ?Stima geologica
    1292 – In corso
    Near Madinah
  2. 1256VEI 3Osservata
    1256-06-05 – 1256-07-27
    Fissure 20 km SE of Madinah
  3. 641VEI 2Osservata
    641 – In corso
    West of Madinah

Link esterni

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