The Next Big Alaska Quake: What You Need to Know

Alaska is no stranger to earthquakes, and with its unique geography and geology, it's not surprising that the state experiences frequent seismic activity. Recently, a moderate earthquake struck the Fox Islands in the Aleutian Islands chain off the coast of Alaska, leaving many wondering about the potential risks and consequences of such events.

Moderate earthquakes, like the one that occurred on Monday, typically have a magnitude between 5.5 and 6, which is considered moderate in terms of intensity. According to experts, earthquakes with this magnitude can cause slight damage to buildings, although they are not expected to result in significant destruction.

However, as we've seen in other parts of the world, such as Indonesia, even moderate earthquakes can have devastating consequences. In November 2022, a 5.6-magnitude earthquake struck Java, Indonesia, killing 260 people and displacing over 13,000 others when homes and buildings collapsed.

So, what makes Alaska particularly prone to earthquakes? The answer lies in its unique geology. The Pacific Plate is being forced under the North American Plate, causing earthquakes as the plates move against each other. This process, known as subduction, has created a seismically active area beneath the Fox Islands and surrounding regions.

The Fox Islands themselves are part of a chain of islands that stretch from Alaska to Japan, and they're subject to frequent earthquakes year-round. In fact, the US Geological Survey (USGS) reports that some of the cities exposed to this quake were Akutan, Dutch Harbor, and Unalaska, which are all located in structures that are resistant to earthquake shaking.

While the risk of damage from moderate earthquakes like this one is relatively low, it's essential to remember that Alaska's infrastructure was not designed with earthquake resistance in mind. In fact, many buildings in the state are vulnerable to earthquake damage due to their construction and materials.

For instance, unreinforced brick masonry and reinforced masonry construction are two of the most vulnerable building types. These structures can collapse or suffer significant damage during a moderate earthquake, putting people's lives at risk.

As authorities continue to investigate the recent quake and assess any potential damage, it's crucial for residents and visitors alike to stay informed about earthquake risks and take steps to prepare for potential disasters. By doing so, we can better mitigate the impacts of earthquakes like this one and ensure the safety of those living in Alaska.

Sources:

* USGS: Preliminary M5.6 Earthquake Fox Islands, Aleutian Islands, Alaska Nov-28 06:13 UTC

* Newsweek: 'Moderate 5.6 Magnitude Earthquake Hits Alaska's Fox Islands'

* Indonesia's National Disaster Management Agency (BNPB): 'Earthquake in Java, Indonesia

Next big alaska quake