Kathmandu, Nepal — A recent study conducted at the Kakani Seismic Station (NK.KKN) has revealed significant insights into background seismic noise levels in the region. Located north of Kathmandu in Nuwakot, the station plays a crucial role in monitoring seismic activities as part of Nepal's earthquake preparedness initiatives.
The research, led by Aastha Poudel alongside a team from Tribhuvan University's Central Department of Geology and the National Earthquake Monitoring and Research Centre (NEMRC), analyzed data recorded between 2016 and 2024. Paudel emphasized the importance of understanding background noise levels for improving the accuracy of earthquake monitoring.
Key Findings:
1. Day-Night Noise Variation: Noise levels were higher during the daytime, primarily due to human activities such as transportation and tourism. Nighttime noise was significantly lower, attributed to reduced activity.
2. Seasonal Variation: Noise levels decreased during the monsoon season (June–August) and increased in the dry winter months (November–February).
3. Unusual Events: A spike in noise was observed on February 14, 2023, possibly linked to increased human activities, indicating the influence of local events on seismic noise data.
4. Infrastructure Impact: The research suggests that the station's proximity to highways, settlements, and tourist attractions may contribute to elevated noise levels.
Expert Insight:
According to Aastha Poudel, “Understanding background seismic noise is crucial for improving earthquake monitoring. By distinguishing between noise from human activities and natural seismic events, we can enhance the accuracy of our monitoring systems and better prepare for potential disasters.”
Implications:
The study underscores the importance of analyzing background noise to improve the accuracy of earthquake monitoring. The findings will assist scientists in filtering out noise interference, enabling better detection of seismic signals.
About Kakani Seismic Station:
Established through a collaboration between Tribhuvan University and the Department of Mines and Geology, the Kakani Seismic Station serves as a vital component of Nepal's seismic network, with data made publicly accessible via EarthScope Data Center (IRISDMC).
This research highlights the need for more noise reduction measures around seismic stations to ensure precise monitoring of tectonic activities, crucial for Nepal's disaster preparedness efforts.
