Blue Lagoon (geothermal spa)

The Blue Lagoon (Icelandic: Bláa lónið [ˈplauːa ˈlouːnɪθ]) is a geothermal spa in southwestern Iceland. The spa is located in a lava field 5 km (3.1 mi) from Grindavík and in front of Mount Þorbjörn on the Reykjanes Peninsula, in a location favourable for geothermal power, and is supplied by water used in the nearby Svartsengi geothermal power station. The Blue Lagoon is approximately 20 km (12 mi) from Keflavík International Airport, and is one of the most visited tourist attractions in Iceland.

Water source

The lagoon is man-made. The water is a byproduct from the nearby geothermal power plant Svartsengi where superheated water is vented from the ground near a lava flow and used to run turbines that generate electricity. After going through the turbines, the steam and hot water pass through a heat exchanger to provide heat for a municipal water heating system. Then the water is fed into the lagoon.

The rich mineral content is provided by the underground geological layers and pushed up to the surface at a pressure of about 1.2 MPa (12 bar) and temperature of 240 °C (464 °F), which is used by the powerplant. Because of its high mineral concentration, the water cannot be recycled, and must be disposed of in the nearby landscape, a permeable lava field that varies in thickness from 50 to 100 cm (20 to 40 in). After the minerals have formed a deposit, the water reinfiltrates the ground, but the deposits render the ground impermeable over time, so the plant needs to continuously dig new ponds in the nearby lava field.

The water renews every two days.[1] The average pH is 7.5 and the salt content is 2.5%.[1] Very few organisms live in the water apart from some blue-green algae. Despite the water not being artificially disinfected, it contains no fecal bacteria, environmental bacteria, fungi, or plants.[1]


Shortly after the opening of the Svartsengi power plant in 1976, the runoff water had made pools. In 1981, a psoriasis patient bathed in the water and noted that the water alleviated his symptoms[2] and the lagoon subsequently became popular.[3] Bathing facilities opened in 1987, and in 1992 the Blue Lagoon company was established.[3]

Studies made in the 1990s confirmed that the lagoon had a beneficial effect on the skin disease psoriasis.[1] A psoriasis clinic was opened in 1994[3] and in 1995, the Blue Lagoon company began marketing skin products containing silica, algae, and salt.[3]

The lagoon recorded 1.3 million visitors in 2017,[4] up from 919,000 visitors in 2015.[5] The company had a revenue of €102 million and a profit of €31 million in 2017.[4] It has over 600 employees.[4] The entry fee is from $64.[6]

2023 earthquake swarm and volcanic eruption  Annotated aerial view of area involved in 2023 seismic disturbances

On 23 October 2023, the Department of Civil Protection and Emergency Management announced a level of uncertainty due to a seismic swarm in the area.[7] The resort faced some criticism for continuing to accept customers with some likening the situation to events leading up to the 2019 Whakaari/White Island eruption.[8] Guests were reportedly not informed about the unfolding events in the area and the risk of using the lagoon.[9] On 4 November 2023, Helga Árnadóttir, CEO of sales at the Blue Lagoon said that closing the resort was not in the picture.[10] Helga criticized Þorvaldur Þórðarson [is], professor of geology at the University of Iceland, for predicting an eruption in the area, saying that there were no harmonic tremors reported.[11] On 7 November, the tour company Reykjavik Excursions cancelled all trips to the lagoon for three days due to concern about their staff and customer's well-being.[12][13] The resort remained open until 9 November 2023, when about 40 guests at the Silica hotel were reported fleeing in panic due to a seismic swarm in the area and the resort announced a temporary one week closure.[14][15]

The management of the Blue Lagoon announced the site's closure to visitors from 9–16 November as a precaution following the earthquakes.[16] The closure period was later extended to 30 November 2023,[17] and then further to December 7.[18]

Though briefly reopened, the Blue Lagoon was again closed until January 6 due to a volcanic eruption at Sundhnúkur, all facilities were reopened by January 10. Another eruption caused a further closure on January 14, reopening again by January 20.[19] A third eruption on the February 8 forced the resort to close again[20] but reopened once more on February 16.

^ a b c d Olafsson, J (December 1996). "The Blue Lagoon in Iceland and psoriasis". Clinics in Dermatology. 14 (6): 647–651. doi:10.1016/S0738-081X(96)00099-5. PMID 8960807. ^ Valur Margeirsson. "Leiðrétt útgáfa um tilurð Bláa lónsins". Víkurfréttir (in Icelandic). Archived from the original on 8 March 2019. Retrieved 18 March 2019. ^ a b c d "History of the Blue Lagoon" (PDF) (presentation deck) (in Icelandic). Blue Lagoon. Archived (PDF) from the original on 12 May 2023. Retrieved 18 March 2019. ^ a b c Helgi Magnússon. "Annual Report of the Chairman of the Board for 2017". Blue Lagoon (in Icelandic). Archived from the original on 11 April 2021. Retrieved 18 March 2019. ^ "919,000 visited Iceland's Blue Lagoon in 2015". Iceland Monitor. Archived from the original on 1 December 2018. Retrieved 9 January 2020. ^ Batarags, Katie Warren, Lina. "Disappointing photos show what Iceland's famous Blue Lagoon looks like in real life". Business Insider. Archived from the original on 21 December 2019. Retrieved 9 January 2020.{{cite web}}: CS1 maint: multiple names: authors list (link) ^ "Civil Protection Uncertainty Phase due to earthquakes on the Reykjanes peninsula". ^ "Lokum Bláa Lóninu". ^ "Ferðamenn ekki upplýstir um jarðhræringar við komuna í Bláa lónið: "Nei, alls ekki"". ^ "Ekki í stöðunni að loka Bláa lóninu: „Við fylgjum alfarið ráðleggingum sérfræðinganna"". ^ "Bláa Lónið ósátt með eldgosaspá Þorvaldar: „Engar vísbendingar um gosóróa"". ^ "Information on the Ongoing Seismic Activity and Volcanic Unrest on the Reykjanes Peninsula". ^ "Reykjavík Excursions cancel Blue Lagoon trips for three days". ^ "Geothermal spa closes in Iceland as guests flee after series of earthquakes". ^ "Seismic Activity | Blue Lagoon". Blue Lagoon Iceland. ^ Buckley, Julia (10 November 2023). "Iceland's Blue Lagoon closed as 1,000 earthquakes hit in 24 hours". CNN. Archived from the original on 11 November 2023. Retrieved 11 November 2023. ^ Tómas, Ragnar (14 November 2023). "Blue Lagoon to Remain Closed Until November 30". Iceland Review. Retrieved 16 January 2024. ^ Oberholtz, Chris (1 December 2023). "Blue Lagoon extends closure as Iceland's earthquake activity continues decreasing". FOX Weather. Retrieved 16 January 2024. ^ "Iceland's Blue Lagoon temporarily closed following volcanic eruption: When will it reopen?". USA TODAY. Retrieved 16 January 2024. ^ "Iceland: lava engulfs road, forcing Blue Lagoon to close – video". the Guardian. 8 February 2024. ISSN 0261-3077. Retrieved 10 February 2024.
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