The phrase "a gigantic eruption" is correct and usable in written English.
It can be used to describe a large and powerful volcanic eruption or a metaphorical explosion of emotions or events.
Example: "The scientists were alarmed by the signs of a gigantic eruption that could potentially devastate the surrounding area."
Alternatives: "a massive eruption" or "a colossal eruption".
Mr. Scheider adds helpfully that such a "gigantic eruption could have occurred".
St. Helens, Washington, U.S. 8,363 2,549 1831 A gigantic eruption in 1980 devastated 550 square km (210 square miles) of mountain terrain and spread ash over Washington, Idaho, and Montana.
Sometimes we get to see a gigantic eruption on Io like the one we witnessed in February 2001 at Keck Observatory.
A century later the threshing machine was greeted by riots.In 1815 a gigantic volcanic eruption at Tambora in Indonesia led to the famous "year without a summer".
Sakurajima Volcano is a small island and is located at the rim of the Aira Caldera that produced a gigantic silicic eruption about 25,000 years ago (Aramaki1969).
The gigantic eruption of Mt Krakatoa in Indonesia in 1883, the loudest recorded bang in history, threw out so much ash that spectacular sunsets were recorded for years afterwards.
How did this gigantic eruption affect modern humans?
YELLOWSTONE SUPERVOLCANO ERUPTION Every so often, a gigantic supervolcano erupts and kills pretty much everything on the continent it's on.
Beginning on June 6 , 1912 after five days of violent earthquakes on the Alaska Peninsula, one of the most gigantic eruptions in recorded history blasted more than 7 cubic miles (29 cubic km) of volcanic material into the atmosphere and stratosphere in a period of 60 hours.
Pinatubo, Luzon, Philippines 4,875 1,486 1991 A gigantic explosion in 1991 may have produced more ash and smoke than any other volcanic eruption of the 20th century.
Just a gigantic headache.
