Study authors called it the highway from hell. The 1963–65 eruption of Irazú, like all others of this volcano during the historic period, produced only ash and other fragmental ejecta without lava.
Progressive caving of the vent walls, which enlarged the diameter of the vent from 200 meters to 525 meters, kept dropping wallrock down onto the exploding magma, and at times stopped the eruption for a day or two by plugging the vent. Irazú’s first eruption was recorded on Feb. 16, 1723, by Costa Rican Governor Diego de la Haya Fernández, who noted that a dark column of smoke was visible over the volcano and that ashes were blown as far as Curridabat. Irazu Volcano is Costa Rica’s highest active volcano although it is has been dormant since 1965.
Earthquake studies still show that magma is moving beneath the volcano.
You can also search for this author in Volcán Irazu (3432 meters) is the highest volcano in Costa Rica.
2013;500(7460):68–72. Publication authorized by the Director, Costa Rica Irazú Executive Commission and by the Director, U. S. Geological Survey.Murata, K.J., Dondoli, C. & Saenz, R. The 1963–65 eruption of Irazú volcano, Costa Rica (the period of March 1963 to October 1964). Eruptions continued throughout the year, with major blocks of material exploding into the air and ash falling on Cartago, which was then the capital. The initial outbreak on March 13, 1963 started with a series of great explosions that hurled out much ash, blocks, and bombs, but the activity soon settled down to alternating periods of explosive cruptions and quiet emission of steam. Due its height and position in the Central Volcanic Range Irazu Volcano is a strategic point for telecommunications in the country. The prolonged ashfall severely damaged dairy, vegetable, and coffee farms, and for a while made daily life in the affected cities extremely difficult.
The national park contains both primary and secondary montane forests and is home to armadillos, owls, rabbits, foxes, woodpeckers, and hummingbirds.Irazú has erupted frequently in historical times — at least 23 times since its first historically recorded Ruprecht P, Plank T. Feeding andesitic eruptions with a high-speed connection from the mantle. 1917 of July 30, 1955, published in Official newspaper La Gaceta 175 of August 9 of that year. The scoriaceous and pumiceous bombs were porphyritic two-pyroxene olivine basaltic andesite, and their composition remained remarkably constant throughout the eruption.The ash section was about 2 meters thick, 800 meters downwind from the vent in June 1964. The 1963–65 eruption of Irazú, like all others of this volcano during the historic period, produced only ash and other fragmental ejecta without lava. Panorama of Irazú Volcano.
The name could come from either the combination of "ara" (point) and "tzu" (thunder)The volcano's summit has several craters, one of which contains Diego de la Haya, a green From the top it is possible to see both the Atlantic and Pacific Oceans on a clear day.The volcano is contained within the Irazú Volcano National Park, which spreads across 5,705 acres (2,300 ha).
Management Plan Irazú Volcano National Park Irazú Volcano National Park was created by Law No. Herding tourists – The rangers at Irazu volcano drive their pickup out onto the rim every day at 3:15 and start herding the tourists back towards the exit (Sue and Mel in the center of the pic) The park closes at 3:30 p.m. and the drive up from Cartago takes at least 30 minutes so although it’s close you’ll want to start before noon to expect to have any time to enjoy the park. The irazu volcano is a complex volcanic shield.