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Portugal · Fissure vent

São Jorge Island

Sao Jorge

Type
Fissure vent
Elevation
1053m
Last eruption
1902
São Jorge Island
Photo: Image Science and Analysis Laboratory, NASA-Johnson Space Center. · Public domain · Wikimedia Commons
Type
Fissure vent
Country
Portugal
Region
Atlantic Ocean / Azores-Terceira Rift Volcanic Province
Elevation
1053m
Coordinates
38.650, -28.080
Last eruption
1902
Tectonic setting
Rift zone / Oceanic crust (< 15 km)
Landform
Cluster
Major rock type
Basalt / Picro-basalt

Geological summary

The dominantly basaltic São Jorge Island is 55 km long and 6.5 km wide. It was formed by fissure eruptions beginning in the eastern part of the island.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

São Jorge is an island in the central group of the Azores archipelago and part of the autonomous region of Portugal. It is separated from its nearest neighbours by the 15-kilometre (9.3 mi) Pico-São Jorge Channel; the three islands are often referred colloquially as the Triângulo ("Triangle") group or just "The Triangle". São Jorge is a relatively long thin island with tall cliffs, whose 8,381 inhabitants are concentrated on various geological debris fields (fajãs) along the north and south coasts; from east to west, the island is 53 kilometres (33 mi) long and, north to south, 8 kilometres (5.0 mi) wide: its area is 237.59 square kilometres (91.73 mi2).

Wikipedia · CC BY-SA · Read full article →

Eruption history

11 recordedGlossary

Record summary

Confirmed eruptions
10
Uncertain eruptions
1
Span of confirmed record
2137 BCE – 1902
Largest confirmed eruption
VEI 3 (1580)
Confirmed eruptions since 1900
1
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
2137 BCE~1942 BCE · 1 eruptions · max VEI ?402~597 · 1 eruptions · max VEI ?1183~1378 · 2 eruptions · max VEI ?1378~1573 · 2 eruptions · max VEI ?1573~1769 · 1 eruptions · max VEI 31769~1964 · 4 eruptions · max VEI 22137 BCE1161 BCE184 BCE7921769

Detailed timeline

  1. 1964VEI ?Method not stated
    1964-02-18 – 1964-02-18
    Submarine off SW coast
  2. 1902VEI 0Observed
    1902-05-07 – 1902-05-08
    Submarine, ~27 km ESE of Ponta do Topo
  3. 1808VEI 1Observed
    1808-05-01 – 1808-06-10
    Sao Jorge
  4. 1800VEI 2Observed
    1800-06-24 – 1800-06-25
    Submarine, ~35 km SE of Ponta do Topo
  5. 1580VEI 3Observed
    1580-05-01 – 1580-08-30
    Sao Jorge (SW side)
  6. 1483VEI ?Geological estimate
    1483 – end unknown
    Sao Jorge
  7. 1426VEI ?Geological estimate
    1426 – end unknown
    Sao Jorge
  8. 1293VEI ?Geological estimate
    1293 – end unknown
    Sao Jorge
  9. 1282VEI ?Geological estimate
    1282 – end unknown
    Sao Jorge
  10. 412VEI ?Geological estimate
    412 – end unknown
    Sao Jorge
  11. 2137 BCEVEI ?Geological estimate
    2137 BCE – end unknown
    Sao Jorge

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.