Opemipo Jokotagba
Updated on: October 8, 2024 4:10 pm GMT
A magnitude-4.5 earthquake struck the Hunter Region of New South Wales early Saturday morning, shortly before 6 a.m. local time. The tremor, recorded at a depth of 5 kilometers near Muswellbrook, follows a series of similar seismic events in the area over the past weeks. Geoscience Australia classifies the recent seismic activity as an “earthquake swarm,” indicating a pattern of moderate to large earthquakes and their corresponding aftershocks.
Recent earthquakes in the Hunter Region began gaining attention following a magnitude-4.7 tremor felt across New South Wales on August 23, which was closely followed by another magnitude-4.5 quake the next day. Dr. Trevor Allen, a senior seismologist with Geoscience Australia, noted that local residents had been reporting feeling these quakes from as far away as Wollongong, Tamworth, and even Dubbo.
Impact on Utilities and Local Community
Saturday’s quake left approximately 2,500 customers without power in the region, but power was restored to most by late morning. Ausgrid reported that all customers had their electricity restored by noon. In addition to power outages, water supply interruptions were also reported, but these were resolved shortly after the earthquake.
Dr. Allen shared that the organization had received around 850 reports from residents who felt the earthquake, with about 100 of these reports indicating potential property damage, predominantly minor issues such as hairline cracks in plaster and masonry. The Mt Arthur Coal Mine temporarily halted operations to conduct safety inspections following the quake. Although a worker reportedly sustained minor injuries, it was later confirmed that no serious injuries occurred.
Community Reactions
The earthquake startled many during the early morning hours. A resident from Berkley Vale, over 150 kilometers away, expressed her fright upon feeling the house shake. “The cupboards rattled, and the whole house just sort of shook,” she said, indicating the tremor’s impact even at a distance. Similarly, a resident from Muswellbrook described her home shaking for several seconds, leading to fallen photographs and a noticeable disturbance in the household.
Reports indicate that the quake’s intensity was sufficient to rattle windows and cause anxiety among those in the vicinity. Local police and emergency services have not reported any significant damage or injuries associated with the earthquake.
Understanding the Earthquake Swarm
The recent seismic activity in the Hunter Region has been characterized by a series of events that do not follow a traditional aftershock pattern. Instead, this “earthquake swarm” has been marked by individual events, each with its distinct aftershocks. Dr. Allen emphasized that while predictions about future seismic events are challenging, the region may experience further earthquakes of at least magnitude 3 in the coming weeks to months, possibly even larger.
Since August 23, Geoscience Australia recorded more than 30 earthquakes in the region, highlighting an unusual level of seismic activity for eastern Australia. Historically, earthquake swarms are more prevalent in western regions, such as the Wheatbelt in southwest Western Australia.
Implications for Nuclear Facility Proposals
The seismic activity in the Hunter region has also reignited discussions regarding the proposed nuclear power plant near Muswellbrook. The site is among seven proposed locations by the federal government for potential nuclear development. Seismologists, however, assure that the regulations surrounding the construction of nuclear facilities include rigorous geotechnical assessments to ensure safety against earthquakes.
Dr. Allen mentioned that the International Atomic Energy Agency has strict criteria for nuclear sites, particularly concerning seismic activity. There are industry standards in place that dictate the resilience of such structures to earthquakes, ensuring any proposed facilities would be designed to withstand significant seismic events.
Local officials have acknowledged the recent tremors but maintain that the geological factors governing the site remain acceptable for development. This includes factors beyond mere seismic activity, such as proximity to populated areas and logistical considerations.
Looking Ahead
With further seismic events anticipated, local authorities are monitoring the situation closely. Residents are encouraged to remain aware of emergency protocols, and those who felt the quake can report their experiences to Geoscience Australia to aid in assessing the tremor’s impact. The potential for additional activity has both residents and local figures engaged in serious discussions about community preparedness and infrastructure resilience moving forward.
Scientists and officials are working hard to learn more about the earthquake swarm. They will keep collecting information and will share updates with the community as they find out more.
