Plinian eruption

A Plinian eruption is a kind of volcanic eruption which is similar to that of Mount Vesuvius in the year 79 AD. It is named after Pliny the Younger who wrote the only surviving eyewitness account of the eruption. That eruption of Vesuvius killed Pliny the Elder, the uncle of Pliny the Younger.

Plinian eruptions have columns of gas and volcanic ash high into the stratosphere. There is a large amount of pumice ejected into the atmosphere and very powerful gas blast eruptions.

Short eruptions can end in less than a day. Longer ones can take several days to months. These eruptions begin with clouds of volcanic ash and occasionally pyroclastic flows.  Sometimes the amount of magma erupted is so large that the top of the volcano collapses.  This leaves a caldera behind. Fine ash can deposit over large areas. Plinian eruptions often happen with loud noises, such as those created by Krakatoa.

Large Plinian eruptions
Some examples of large Plinian eruptions that formed calderas include the following:
the 2022 Hunga Tonga eruption in Tonga;
the 1991 Mount Pinatubo eruption in Luzon in the Philippines;
the 1980 eruption of Mount St. Helens in Washington, United States;
the 1883 eruption of Krakatoa in Indonesia;
the 1815 eruption of Mount Tambora, also in Indonesia;
the 1667 and 1739 eruptions of Mount Tarumae in Japan;
the 1645 BC eruption of Santorini caldera in Greece; Enlightenment activities for improvement on disasters from Tarumae Volcano, Japan, Cities on Volcanoes 4, 23-27 January 2006
the 4860 BC eruption forming Crater Lake in Oregon, United States;
the 11000 BC eruption of the Laacher See in Germany;
the Long Valley Caldera eruption in eastern California, United States over 760,000 years ago;
and, of course, the AD 79 eruption of Mount Vesuvius in Italy, which was the prototypical Plinian eruption.
The lava is usually rhyolitic and has a lot of silicates. Basaltic lavas are unusual for Plinian eruptions; the most recent example is the 1886 eruption of Mount Tarawera in New Zealand.

Pliny's description
Pliny wrote about what his uncle's did after first seeing the eruption:

Pliny the Elder went to rescue some of the victims. He sailed across the Gulf of Naples to Stabiae (near the modern town of Castellammare di Stabia). Pliny the Younger wrote an account of his death, and suggested that he collapsed and died through inhaling poisonous gases emitted by the volcano. His body was found buried under the ashes of the Vesuvius with no apparent injuries on 26 August, after the plume had dispersed. This confirmed the death through asphyxiation or poisoning.

Related pages
Volcano
Pliny the Younger

References

Other websites
 USGS Photo Glossary Entry for Plinian Eruptions

Category:Volcanic eruptions