This Day in History: Aug 27, 1883: Krakatau explodes.
This is how Krakatau volcano sounded like last night, timelapse included.
Incidentally, the explosive 1883 eruption of Krakatau was one of the loudest in recorded history.
As you can see from this last image(above), Krakatau still has periods of dome-forming and Strombolian-style eruptions, with the
most recent activity being about a year ago.
In the case of Krakatau, the acoustic emissions from this volcano's 1883 eruption were so low,
but so loud that they were heard as far away as Australia!
On August 26 the party was over when Krakatau blew apart with unimaginable violent fury,
setting off a domino effect of natural disasters that would impact the globe well into the future.
The initial indications that Krakatau was awakening for the first time in two centuries
was an observation by a German war ship of a dust and ash cloud over the long dormant volcano.
And here is a second example of some of the sounds made by a volcano,
this time at Krakatau, and at a much greater distance away from the volcano than in the previous example.
On a small, desolate island called Krakatau west of Sumatra in Indonesia,
the most violent volcanic eruption in recorded history occurred, estimated to have produced an equivalent of a 200 megaton explosion, which is about 4 times that of the largest nuclear bomb ever detonated, the Tsar Bomba.
Sound waves at such frequencies have a long wave length and can travel far-
think of the boom of Krakatau volcano in Indonesia,
which was heard in Australia- and so aero-acoustic sensors can be placed at a further, safer distance away from a volcano than other types of monitoring equipment.