Tag Archives: tsunami

Remembering History: The Lisbon Earthquake of 1755(1 Nov 1755)

Copper engraving from 1755 showing the catastrophe of the day when the earthquakes hit, the tsunami, and the fires.
Unknown author
Public domain via Wikimedia Commons

 

Portugal was a prosperous country in the 18th century. It had acquired immense wealth thanks to its colony in Brazil and its trade in Asia. Lisbon had become a bustling center of trade and one of the busiest ports in the Atlantic. Roughly 10 percent of its population lived in Lisbon and many had become wealthy off the trade generated in gold and diamonds. It would all change on All Saints Day in 1755.

Around 9:40 am three tremors struck Lisbon and one of them is thought to have been 8.0. The shaking was so violent that it was felt in Morocco. The earthquakes caused considerable damage but something far worse occurred. A 20-foot tsunami generated by the earthquakes raced ashore knocking down everything in its path. Since it was All Saints Day many were in churches where candles were lit. When the earthquakes hit, churches and buildings were toppled killing many right away and injuring scores others. The lit candles then ignited fires and were fanned by the winds. The fires would burn for days, and aftershocks would cause more damage and death,

Most of the destruction in Lisbon took place along the Tagus River and the center of the city. The destruction took with it priceless works of art and homes of both the wealthy and the poor. Other areas of Portugal were affected by the earthquake and tsunami. Lisbon saw great cathedrals toppled along with the grand library and the royal palace. Those who had fled down to the docklands saw water had retreated. Some went into the shallow water to try to retrieve treasure from sunken ships not knowing the great danger they were in. When the tsunami hit, everyone in docklands were swept away and perished. Many who had made it out of the city after the earthquake or after the tsunami would never return. Great works of art, literature and prized buildings for their architecture were all gone.

It was a stunning blow to Portugal and the city had to be rebuilt from scratch. 85% percent of the infrastructure was gone. The old city had been built in medieval times with narrow streets and confusing layout. The Marquis of Pombal, the prime minister, was given the task of rebuilding Lisbon. Lisbon would be modeled on French architectural trends of the time that called for wider streets, squares, and avenues. Using the military as a guide, buildings were put up in manner followed an exact pattern making it prefabricated for its time. And they made sure the buildings were made strong so as not to collapse from an earthquake again. The earthquake greatly affected the economy of Portugal that took a while to recover. While price controls were enacted, there were still volatile swings in prices. If there was an upside, construction workers got paid well for their efforts (comparative to what they made before the catastrophe). Also, the economy was reformed in the process making the country less dependent on Great Britain.

The Marquis of Pombal sent out a survey to all local parishes asking them for information about what happened. He was the first person to do this and the preserved detailed responses he got back are a wealth of information as to how much the earthquake did in many areas of the country. This has allowed a scientific reconstruction of the earthquake (and tsunami as well) allowing scientists to understand more fully what these natural forces can do. In effect, Pombal began the science of seismology, the collecting of data about such events.

Today if you visit Lisbon, you can see the effects of the reconstruction and how its people adapted to this massive reconstruction. Rick Steves covers it in his travel to Lisbon. Old world charm with very modern touches.

Sources

Lisbon Earthquake of 1755 | Great Lisbon Quake, Tsunami and Fire Encyclopedia Britannica, 25 Oct. 2023, www.britannica.com/event/Lisbon-earthquake-of-1755.

Earthquake Takes Heavy Toll on Lisbon. HISTORY, 13 Nov. 2009, www.history.com/this-day-in-history/earthquake-takes-heavy-toll-on-lisbon.

Cohen, Isabel. “The Lisbon Earthquake of 1755: The Day the World Was Shaken.” bePortugal, 26 Sept. 2019, beportugal.com/lisbon-earthquake.

Wikipedia contributors. “1755 Lisbon Earthquake.” Wikipedia, 23 Oct. 2023, en.wikipedia.org/wiki/1755_Lisbon_earthquake.

Remembering History: The Lisbon Earthquake of 1755

Copper engraving from 1755 showing the catastrophe of the day when the earthquakes hit, the tsunami, and the fires.
Unknown author
Public domain via Wikimedia Commons

Portugal was a prosperous country in the 18th century. It had acquired immense wealth thanks to its colony in Brazil and its trade in Asia. Lisbon had become a bustling center of trade and one of the busiest ports in the Atlantic. Roughly 10 percent of its population lived in Lisbon and many had become wealthy off the trade generated in gold and diamonds. It would all change on All Saints Day in 1755.

Around 9:40 am three tremors struck Lisbon and one of them is thought to have been 8.0. The shaking was so violent that it was felt in Morocco. The earthquakes caused considerable damage but something far worse occurred. A 20-foot tsunami generated by the earthquakes raced ashore knocking down everything in its path. Since it was All Saints Day many were in churches where candles were lit. When the earthquakes hit, churches and buildings were toppled killing many right away and injuring scores others. The lit candles then ignited fires and were fanned by the winds. The fires would burn for days, and aftershocks would cause more damage and death,

Most of the destruction in Lisbon took place along the Tagus River and the center of the city. The destruction took with it priceless works of art and homes of both the wealthy and the poor. Other areas of Portugal were affected by the earthquake and tsunami. Lisbon saw great cathedrals toppled along with the grand library and the royal palace. Those who had fled down to the docklands saw water had retreated. Some went into the shallow water to try to retrieve treasure from sunken ships not knowing the great danger they were in. When the tsunami hit, everyone in docklands were swept away and perished. Many who had made it out of the city after the earthquake or after the tsunami would never return. Great works of art, literature and prized buildings for their architecture were all gone.

It was a stunning blow to Portugal and the city had to be rebuilt from scratch. 85% percent of the infrastructure was gone. The old city had been built in medieval times with narrow streets and confusing layout. The Marquis of Pombal, the prime minister, was given the task of rebuilding Lisbon. Lisbon would be modeled on French architectural trends of the time that called for wider streets, squares, and avenues. Using the military as a guide, buildings were put up in manner followed an exact pattern making it prefabricated for its time. And they made sure the buildings were made strong so as not to collapse from an earthquake again. The earthquake greatly affected the economy of Portugal that took a while to recover. While price controls were enacted, there were still volatile swings in prices. If there was an upside, construction workers got paid well for their efforts (comparative to what they made before the catastrophe). Also, the economy was reformed in the process making the country less dependent on Great Britain.

The Marquis of Pombal sent out a survey to all local parishes asking them for information about what happened. He was the first person to do this and the preserved detailed responses he got back are a wealth of information as to how much the earthquake did in many areas of the country. This has allowed a scientific reconstruction of the earthquake (and tsunami as well) allowing scientists to understand more fully what these natural forces can do. In effect, Pombal began the science of seismology, the collecting of data about such events.

Today if you visit Lisbon, you can see the effects of the reconstruction and how its people adapted to this massive reconstruction. Rick Steves covers it in his travel to Lisbon. Old world charm with very modern touches.

Sources:

Lisbon Earthquake of 1755 | Great Lisbon Quake, Tsunami and Fire Encyclopedia Britannica, 25 Oct. 2023, www.britannica.com/event/Lisbon-earthquake-of-1755.

Earthquake Takes Heavy Toll on Lisbon. HISTORY, 13 Nov. 2009, www.history.com/this-day-in-history/earthquake-takes-heavy-toll-on-lisbon.

Cohen, Isabel. “The Lisbon Earthquake of 1755: The Day the World Was Shaken.” bePortugal, 26 Sept. 2019, beportugal.com/lisbon-earthquake.

Wikipedia contributors. “1755 Lisbon Earthquake.” Wikipedia, 23 Oct. 2023, en.wikipedia.org/wiki/1755_Lisbon_earthquake.

 

Shop for Lisbon Earthquake Books

Krakatoa Eruption Kills Thousands and Heard 3,000 Miles Away (27 Aug 1883)

The eruption of Krakatoa, and subsequent phenomena. Report of the Krakatoa Committee of the Royal Society (London, Trubner & Co., 1888) Public Domain
The eruption of Krakatoa, and subsequent phenomena. Report of the Krakatoa Committee of the Royal Society (London, Trubner & Co., 1888)
Public Domain

On 20 May 1883, Krakatau(Krakatoa)–a small volcanic island west of Sumatra in Indonesia–came alive with an eruption noticed by a passing German warship. Other eruptions would be noticed by commercial liners and those living on nearby islands for the next two months. Then on 26 Aug an enormous blast took place that destroyed nearly two-thirds of the island. Pyroclastic flows and huge tsunamis would sweep over nearby islands and coastlines. But the worst came the following morning, 27 Aug, at 05:30. Four eruptions would took place with the resulting sound heard over 3,000 miles away. Ash was propelled fifty miles into the air and would circulate around the globe creating colorful sunsets but also lowering temperatures worldwide by several degrees.

36,000 deaths resulted from the eruption and 31,000 were from the tsunamis created when much of the island fell into the water. The highest waves were 120 feet high when they washed over neighboring islands stripping them of people and vegetation. Pyroclastic flows that stretched as far as 40 miles claimed about 4,500.

The Krakatau eruption of 1883 is considered one of the most violent volcanic activities in modern times and even recorded history. However volcanic activity continues in that area. In 1927, a submarine lava dome was detected in the area that had been destroyed by the eruption in 1883. A new island volcano began to emerge spewing ash. Other islands also started appearing as well but eroded away by the sea. Ultimately a fourth one appeared in August 1930 and was able to last. It was named Anak Krakatau and continues to grow taller each year. It is an active volcano and seemed similar to Stromboli in its eruptions. However more recent eruptions have resulted in volcanologists to warning people to keep a safe distance away. And more ominous is that a large lava dome is growing in its crater. Signs point to one day a very explosive event occurring at this volcano.


REMEMBERING HISTORY: KRAKATOA ERUPTION CAUSES MASSIVE DEATHS

The eruption of Krakatoa, and subsequent phenomena. Report of the Krakatoa Committee of the Royal Society (London, Trubner & Co., 1888)
Public Domain

On 20 May 1883, Krakatau(Krakatoa)–a small volcanic island west of Sumatra in Indonesia–came alive with an eruption noticed by a passing German warship. Other eruptions would be noticed by commercial liners and those living on nearby islands for the next two months. Then on 26 Aug an enormous blast took place that destroyed nearly two-thirds of the island. Pyroclastic flows and huge tsunamis would sweep over nearby islands and coastlines. But the worst came the following morning, At 05:30 am four eruptions would took place with the resulting sound heard over 3,000 miles away. Ash was propelled fifty miles into the air and would circulate around the globe creating colorful sunsets but also lowering temperatures worldwide by several degrees.

36,000 deaths resulted from the eruption and 31,000 were from the tsunamis created when much of the island fell into the water. The highest waves were 120 feet high when they washed over neighboring islands stripping them of people and vegetation. Pyroclastic flows that stretched as far as 40 miles claimed about 4,500.

The Krakatau eruption of 1883 is considered one of the most violent volcanic activities in modern times and even recorded history. However volcanic activity continues in that area. In 1927, a submarine lava dome was detected in the area that had been destroyed by the eruption in 1883. A new island volcano began to emerge spewing ash. Other islands also started appearing as well but eroded away by the sea. Ultimately a fourth one appeared in August 1930 and was able to last. It was named Anak Krakatau and continues to grow taller each year. It is an active volcano and seemed similar to Stromboli in its eruptions. However more recent eruptions have resulted in volcanologists to warning people to keep a safe distance away. And more ominous is that a large lava dome is growing in its crater. Signs point to one day a very explosive event occurring at this volcano.