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The volcanic island of Krakatoa, also known as Krakatau, is located in the Sunda Strait between Java and Sumatra, Indonesia. The 1883 eruption of Krakatoa was one of the most catastrophic volcanic events in history, with explosions heard as far away as Australia, 2,200 miles (3,500 km) away. The eruption threw nearly five cubic miles of rock fragments and large quantities of ash into the air, causing a tsunami that destroyed towns and villages and killed more than 36,000 people. Since 1883, Krakatoa has continued to experience volcanic activity and remains an active volcano today.
| Characteristics | Values |
|---|---|
| Distance from Australia to Krakatoa | 2,200 miles (3,500 km) or 3,110 km (1,930 mi) to Perth, Western Australia |
| Date of eruption | 26-27 August 1883 |
| Impact | Deaths of around 36,000 people, destruction of 165 villages and towns, and damage to 132 villages and towns |
| Volcano name | Krakatoa, or Krakatau in Indonesian |
| Volcano type | Volcanic island |
| Volcano location | Sunda Strait, between Java and Sumatra, Indonesia |
| Volcano height | 820 m (2,690 ft) |
| Eruption height | Ash clouds reached 6 miles (10 km) and 17 miles (27 km); ash propelled to a height of 50 miles (80 km) |
| Eruption cause | Movement of tectonic plates, specifically the subduction of the Indo-Australian Plate under the Eurasian Plate |
| Eruption effects | Loud sound heard for 3,000 miles (4,800 km); drop in average global temperatures; increase in rainfall in Los Angeles |
| Recent activity | Eruptions since 1927, with a major collapse in 2018, have formed a new island named Anak Krakatau ("Child of Krakatau") |
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What You'll Learn
- The 1883 eruption of Krakatoa was heard in Perth, Western Australia, 3,110 km away
- The eruption was one of the most violent in history, killing over 36,000 people
- It ejected 25 km3 of rock and caused a drop in average global temperatures
- The explosions were so loud that anyone within 16 km went deaf
- The volcano is located in the Sunda Strait, between Java and Sumatra, Indonesia
The 1883 eruption of Krakatoa was heard in Perth, Western Australia, 3,110 km away
The 1883 eruption of Krakatoa, a volcano on Rakata Island in the Sunda Strait between Java and Sumatra, Indonesia, was one of the most catastrophic volcanic events in recorded history. The explosion was so powerful that it was heard 3,110 kilometres (1,930 miles) away in Perth, Western Australia, and on the island of Rodrigues near Mauritius, 4,800 kilometres (3,000 miles) away. The acoustic pressure wave circled the globe more than three times.
The eruption began on 20 May 1883 and ended on 21 October of the same year. The most destructive eruption occurred on 27 August, when over 70% of the island and its surrounding archipelago were destroyed. The explosion ejected approximately 25 cubic kilometres (6 cubic miles) of rock and large quantities of ash that fell over an area of about 300,000 square kilometres (800,000 square miles). The eruption is estimated to have reached 180 decibels, loud enough to be heard 5,000 kilometres (3,100 miles) away.
The explosion was so powerful that it ruptured the eardrums of sailors on board a ship off the coast of Sumatra. The pressure wave generated by the third and most violent explosion radiated out from Krakatoa at 1,086 kilometres per hour (675 miles per hour). The wave was recorded on barographs around the world and rounded the globe three and a half times.
The 1883 eruption of Krakatoa is estimated to have had an explosive power equivalent to 200 megatons of TNT (840 petajoules), which is roughly four times as powerful as the Tsar Bomba, the most powerful thermonuclear weapon ever detonated. The eruption caused a series of tsunamis, or seismic sea waves, that were recorded as far away as South America and Hawaii. At least 36,417 deaths are attributed to the eruption and the tsunamis it created.
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The eruption was one of the most violent in history, killing over 36,000 people
The eruption of Krakatoa in 1883 was one of the most violent volcanic events in history. Located in the Sunda Strait between Java and Sumatra, Indonesia, Krakatoa's eruption was of a magnitude rarely seen before or since. Beginning on 20 May 1883, and ending on 21 October of that year, the volcano experienced repeated, months-long eruptions. The most destructive of these occurred on 27 August, when over 70% of the island and its surrounding archipelago were destroyed.
The eruption was heard 3,110 kilometres (1,930 miles) away in Perth, Western Australia, and on the island of Rodrigues near Mauritius, 4,800 kilometres (3,000 miles) away. The acoustic pressure wave from the explosion circled the globe more than three times. The eruption was so powerful that it caused the volcano to collapse in on itself, forming a caldera. The energy released from the explosion has been estimated to be equal to about 200 megatonnes of TNT (840 petajoules), roughly four times as powerful as the Tsar Bomba, the most powerful thermonuclear weapon ever detonated.
The eruption threw nearly five cubic miles of rock fragments into the air, along with large quantities of ash that fell over an area of some 300,000 square miles. The ash reached an estimated height of 80 kilometres (50 miles). The violence of the eruptions caused tides in the vicinity to be unusually high, and ships at anchor had to be moored with chains. The surrounding region was plunged into darkness for two and a half days due to the ash in the air.
At least 36,417 deaths are attributed to the eruption and the tsunamis it created. There were no survivors from the 3,000 people on the island of Sebesi. The volcano's collapse triggered a series of tsunamis, or seismic sea waves, recorded as far away as South America and Hawaii. The greatest wave, which reached a height of 37 metres (120 feet), took the lives of 36,000 people in the nearby coastal towns of Java and Sumatra. The eruption also had significant additional effects worldwide in the days and weeks that followed.
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It ejected 25 km3 of rock and caused a drop in average global temperatures
The Krakatoa volcano, located on Rakata Island in the Sunda Strait between Java and Sumatra, Indonesia, erupted violently in 1883. The eruption was one of the most catastrophic in history, with a Volcanic Explosivity Index (VEI) of 6, equivalent to 13,000 times the nuclear yield of the Little Boy bomb that devastated Hiroshima during World War II. The explosion ejected approximately 25 cubic kilometres of rock and caused widespread destruction and loss of life.
The eruption of Krakatoa in 1883 had a significant impact on global temperatures. The volcano injected a large amount of sulfur dioxide (SO2) gas into the stratosphere, which was carried by high-level winds worldwide. This led to an increase in sulfuric acid (H2SO4) concentration in high-level cirrus clouds, resulting in increased cloud reflectivity (albedo). The enhanced reflectivity of the clouds reflected more incoming sunlight, leading to a cooling effect on the planet.
In the year following the eruption, average summer temperatures in the Northern Hemisphere dropped by 0.4°C (0.72°F). Additionally, the global air temperatures decreased by as much as 2.2°F (1.2°C). The eruption's impact on ocean temperatures was also notable, contributing to a reduction in sea level rise caused by human activity. According to researchers, the release of volcanic ashes and aerosols into the upper atmosphere had long-term effects on the global climate.
The eruption of Krakatoa in 1883 was heard thousands of miles away, including in Australia. The explosion resulted in a series of violent explosions that were among the most powerful in recorded history. The energy released from the eruption was equivalent to about 200 megatons of TNT, roughly four times as powerful as the Tsar Bomba, the most potent thermonuclear weapon ever detonated. The southern third of Krakatoa remained, while the northern two-thirds of the island were destroyed, leaving only a rocky islet named Bosun's Rock.
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The explosions were so loud that anyone within 16 km went deaf
The distance from Australia to Krakatoa is approximately 4,500 kilometres (2,800 miles) if we're measuring from the northwest coast of Australia to the Krakatoa archipelago in Indonesia. Now, let's focus on the incredible fact about the Krakatoa eruptions:
The eruptions of Krakatoa in 1883 were unprecedented in recorded history for their magnitude and impact. The series of explosions that culminated on August 26 and 27, 1883, were so powerful that they were heard thousands of miles away. The sound was so intense that it caused permanent hearing loss for anyone within a 16-kilometre (10-mile) radius of the volcano. This fact is a stark reminder of the raw power of nature and the vulnerability of humans in the face of such forces.
To understand how the eruptions caused deafness, we need to delve into the science of sound. Sound is created by vibrations that travel through the air as waves. These waves have a certain intensity, and when they reach our ears, they cause our eardrums to vibrate, transmitting signals to our brains, which we interpret as sound. The louder the sound, the higher the intensity of these waves, and the greater the potential for damage.
Now, imagine the sound waves produced by the Krakatoa eruptions. The energy released during the peak explosive phases of the eruption exceeded 100 megatons of TNT, creating pressure differences of several tens of pascals over a vast area. To put this into perspective, a healthy young adult can hear sounds as low as 0 decibels (dB), while sounds above 85 dB can be harmful, and prolonged exposure to sounds above 120 dB can cause immediate damage. The eruptions of Krakatoa are estimated to have reached a staggering 172 dB!
At 172 dB, the pressure waves generated by the eruptions were not just sound but physical forces capable of devastating anything in their path. The air rippled like the surface of a pond struck by a stone, but with deadly consequences. Within the 16-kilometre radius, the pressure waves would have been powerful enough to rupture eardrums and cause immediate and permanent hearing loss. Beyond this zone, the sound may have still caused temporary deafness and other health issues.
The impact of the eruptions extended far beyond the immediate vicinity of Krakatoa. The sound travelled in all directions, carrying the energy of the explosions across the oceans. Reports came in from ships at sea and coastal areas, with people claiming to have heard the eruptions hundreds and even thousands of miles away. This demonstrates the immense power of nature and serves as a reminder that we are often at the mercy of the planet's geological processes.
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The volcano is located in the Sunda Strait, between Java and Sumatra, Indonesia
The Krakatoa volcano, also known as Krakatau, is located in the Sunda Strait, between Java and Sumatra, Indonesia. It is one of the country's 130 active volcanoes.
The 1883 eruption of Krakatoa was one of the most catastrophic volcanic events in history. The eruption ejected around 25 cubic kilometres of rock, and large quantities of ash fell over an area of 800,000 square kilometres. The explosion was heard 3,600 kilometres away in Australia and on Rodrigues Island near Mauritius, 4,780 kilometres away. The eruption caused a series of tsunamis, or seismic waves, that were recorded as far away as South America and Hawaii. The waves reached a height of 37 metres and caused 36,000 deaths in the coastal towns of Java and Sumatra alone.
The eruption also had a significant impact on the environment. All life on the Krakatoa island group was buried under a thick layer of sterile ash, and it took five years for plant and animal life to begin reestablishing itself. The surrounding region was plunged into darkness for two and a half days due to the ash in the air, and fine dust particles caused vivid sunsets around the world for the following year.
Since the 1883 eruption, a new island has formed at the same location, named Anak Krakatau, or "Child of Krakatau". This island has been the site of frequent eruptions since 1927 and continues to grow over time.
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Frequently asked questions
The distance between Australia and Krakatoa is approximately 2,200 miles (3,500 km).
Krakatoa is a volcanic island located in the Sunda Strait between Java and Sumatra, Indonesia.
Yes, the eruption of Krakatoa in 1883 was one of the most violent volcanic events in recorded history, and its effects were felt in Australia. The explosion was heard 2,200 miles (3,500 km) away in Australia, and the resulting tsunamis caused significant damage to the Australian coastline.
The 1883 eruption of Krakatoa is considered one of the most catastrophic volcanic events in history. The eruption killed more than 36,000 people and destroyed 165 villages and towns near the volcano. It also had a significant impact on the global climate, causing a drop in average temperatures for several years.
In addition to the audible range of the explosion in Australia, the 1883 eruption of Krakatoa resulted in seismic activity that was felt as far away as North Australia. This activity included earthquakes and tsunamis, further highlighting the significant impact of the eruption on the region.
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