1991 Mount Pinatubo | |
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| Total costs | N/A |
| Deaths | 847 |
The 1991 eruption of Mount Pinatubo in the Philippines' Luzon Volcanic Arc was the second-largest volcanic eruption of the 20th century, behind only the 1912 eruption of Novarupta in Alaska. Eruptive activity began on April 2 as a series of phreatic explosions from a fissure that opened on the north side of Mount Pinatubo. Seismographs were set up and began monitoring the volcano for earthquakes. In late May, the number of seismic events under the volcano fluctuated from day-to-day. Beginning June 6, a swarm of progressively shallower earthquakes accompanied by inflationary tilt on the upper east flank of the mountain, culminated in the extrusion of a small lava dome.On June 12, the volcano’s first spectacular eruption sent an ash column 19 km (12 mi) into the atmosphere. Additional explosions occurred overnight and the morning of June 13. Seismic activity during this period became intense. When even more highly gas-charged magma reached Pinatubo's surface on June 15, the volcano exploded, sending an ash cloud 40 km (25 mi) into the atmosphere. Volcanic ash and pumice blanketed the countryside. Huge pyroclastic flows roared down the flanks of Pinatubo, filling once-deep valleys with fresh volcanic deposits as much as 200 m (660 ft) thick. The eruption removed so much magma and rock from beneath the volcano that the summit collapsed to form a small caldera 2.5 km (1.6 mi) across.Fine ash from the eruption fell as far away as the Indian Ocean and satellites tracked the ash cloud as it traveled several times around the globe. At least 16 commercial jets inadvertently flew through the drifting ash cloud, sustaining about $100 million in damage. With the ashfall came darkness and the sounds of lahars rumbling down the rivers. Several smaller lahars washed through the Clark Air Base, flowing across the base in enormously powerful sheets, slamming into buildings and scattering cars. Nearly every bridge within 30 km (19 mi) of Mount Pinatubo was destroyed. Several lowland towns were flooded or partially buried in mud. More than 840 people were killed from the collapse of roofs under wet heavy ash and several more were injured.Rain continued to create hazards over the next several years, as the volcanic deposits were remobilized into secondary mudflows. Damage to bridges, irrigation-canal systems, roads, cropland, and urban areas occurred in the wake of each significant rainfall. Many more people were affected for much longer by rain-induced lahars than by the eruption itself.
Source: Wikipedia 1941 Huaraz avalanche | |
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| Total costs | N/A |
| Deaths | 6000 |
Huaraz ([waˈɾas]) (from Quechua: Waraq or Waras, 'dawn'), founded as San Sebastián de Huaraz, is a city in Peru. It is the capital of the Ancash Region (State of Ancash) and the seat of government of Huaraz Province. The urban area's population is distributed over the districts of Huaraz and Independencia. The city is located in the middle of the Callejon de Huaylas Valley and on the right side of the river Santa. The city has an elevation of approximately 3050 metres above sea level. The built-up area covers 8 km2 and has a population of 120,000 inhabitants, making it the second largest city in the central Peruvian Andes after the city of Huancayo. It is the 22nd largest city in Peru. Huaraz is the seat of the province's Roman Catholic Bishop and the site of the cathedral. Huaraz is the main financial and trade center of the Callejón de Huaylas and the main tourist destination of Ancash region. Moreover, is one of the biggest towns in the Peruvian Andes. Huaraz is the main destinations for winter sports and adventure. Many visitors from around the world come to the city for practicing sports as climbing, hiking, mountain biking and snowboarding, and also to visit the glaciers and mountains of the Cordillera Blanca, mainly Mount Huascarán, which is considered the tallest mountain in tropics, all of them located in Huascarán National Park which UNESCO declared a nature world heritage site. The city was founded before the Inca Empire when humans settled around the valley of the Santa River and Qillqay. Its Spanish occupation occurred in 1574 as a Spanish-indigenous reducción. During the wars for the independence of Peru, the whole city supported the Liberating Army with food and guns, earning the city the title of 'Noble and Generous City' granted by Simón Bolívar. In 1970, 95% of the city was destroyed by an earthquake that damaged much of Ancash Region. 25,000 people died. The city received much foreign assistance from many countries. For this reason the city was named a capital of International Friendship. The main economic activities in the city are farming and tourism. Since Huaraz has tourist infrastructure supporting the Ancash Highlands, the city is the main point of arrival for practitioners of adventure sports and mountaineering. Along with the snowy peaks of the Cordillera Blanca, one can visit archaeological sites like Chavín de Huantar and the eastern highlands of Ancash, known as Conchucos.
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The 1970 Huascarán debris avalanche occurred on May 31, 1970, when a debris avalanche and mudflow...
The 1970 Huascarán debris avalanche occurred on May 31, 1970, when a debris avalanche and mudflow...
Mount Hibok-Hibok (also known as Catarman Volcano) is a stratovolcano on Camiguin Island in the...
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