Heiðarsporðar volcan

fissure vent 490 m / 1608 ft
Iceland, 65.58°N / -16.82°W
Condition actuelle: normal / en sommeil (1 sur 5)

Heidarspordar volcano in the Northern Volcanic Zone is a young system of eruptive fissures, about 22 km long. It formed near the Krafla and Fremrinámar fissure systems and is still in its embryonic stage, characterized by large-volume eruptions, last about 2200 years ago.

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Style éruptif tipique: effusif
Eruptions du volcan Heiðarsporðar: around 300 BC

Rapports sismiques

HeureMag. / ProfondeurDistance/Lieu
jeudi, 16. septembre 2021 18:38 GMT (1 séisme)
16 sept. 2021 18:38 (GMT +0) (16. sept. 2021 18:38 GMT)
1.5

8.3 km
50 km (31 mi)
Iceland: 1.4 Km W of Herðubreið
mercredi, 15. septembre 2021 12:36 GMT (1 séisme)
15 sept. 2021 12:36 (GMT +0) (15. sept. 2021 12:36 GMT)
3.6

7.1 km
47 km (29 mi)
Iceland: 14.7 Km NE of Herðubreiðarlindir
dimanche, 12. septembre 2021 15:53 GMT (1 séisme)
12 sept. 2021 15:53 (GMT +0) (12. sept. 2021 15:53 GMT)
1.1

4.5 km
34 km (21 mi)
Iceland: 1.1 Km N of Þeistareykir
mercredi, 8. septembre 2021 20:04 GMT (1 séisme)
8 sept. 2021 20:04 (GMT +0) (8. sept. 2021 20:04 GMT)
1.1

16 km
27 km (17 mi)
Iceland: 7.8 Km WNW of Herðubreiðarfjöll
dimanche, 5. septembre 2021 16:13 GMT (1 séisme)
5 sept. 2021 16:13 (GMT +0) (5. sept. 2021 16:13 GMT)
1.4

4.2 km
32 km (20 mi)
Iceland: 1.9 Km SW of Þeistareykir

Introduction

The Heidarspordar volcanic system in the Northern Volcanic Zone is about 22 km long, consisting of a fissure swarm and a central volcano defined by high eruptive activity and silicic rocks.
It is embryonic, starting to develop in the marginal area of two adjacent fissure areas, Krafla and Fremrinámar, producing large-volume eruptions. No geothermal activity is present. Magma composition ranges from olivine-tholeiite through tholeiitic basalt and basaltic andesite to dacite. Characteristic activity consists of effusive basaltic eruptions and small predominantly effusive silicic eruptions. It has shown rather low activity in the Holocene but has produced substantial basaltic lava flows. Two eruptive periods have occurred in Holocene time separated by over 8,000 years. The last eruption took place about 2,200 years ago, producing a lava flow covering about 220 km2 and extending 60 km from source.
Source: GVP


See also: Sentinel hub | Landsat 8
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