Earth In Period Of Active Seismic Activity

Nature’s wrath struck in 2004, when a tsunami hit the coasts of several countries around the Indian Ocean. This marked the beginning of what geologists call an “active cycle”, where the Earth experiences greater seismic activity.

Said Professor Kerry Sieh, director at the Earth Observatory of Singapore: “The Earth goes through cycles of seismic energy release, and less release and more release.

“We have definitely been in the active cycle in the last 11 years since 2004. All the magnitude-8.4 earthquakes and bigger, up to 9.2, they all happened in the last 11 years. Several of those have been in Asia.”

The previous active cycle was in the 1950s to mid-1960s, which saw several earthquakes with a magnitude of a high 8 and above 9. But for the next 40 years, there were no records of a quake with a magnitude above 8.3, until 2004.

Since then, a string of devastating earthquakes has caused much destruction, like in Sumatra in 2005 and Fukushima, Japan, in 2011.

“We don’t know whether we are at the end of the cycle or not,” said Professor Sieh. “My hunch is we will continue to see a larger number of large earthquakes. But that’s only a hunch because we don’t really have a way of telling whether we are at the end of the cycle or not.”

In response to the recent Sabah quake, Professor Sieh supported the call by Malaysia’s Youth and Sports Minister Khairy Jamaluddin to relook safety protocols for climbers on Mount Kinabalu and also offered his team’s expertise.



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