Researchers studying Seneca Lake say the lake’s surface waters have warmed significantly over recent decades, raising concerns about impacts on fish habitat and water quality.
Monitoring data collected by Hobart and William Smith Colleges Professor John Halfman shows temperatures in the lake’s upper layers have increased by about 11 degrees Fahrenheit during the period studied. Researcher Jonathan Francois analyzed the long-term data and reported a clear upward trend.
Scientists warn that warming lake temperatures can disrupt natural fish habitats, contribute to harmful algal blooms, and increase nutrient recycling in the water.
Researchers plan to continue monitoring the lake through partnerships and citizen science programs.
A separate research effort is also underway to investigate the long-reported “Seneca Drums,” mysterious booming sounds sometimes heard near the lake.
In early 2026, a team of Cornell geoscientists plans to install eight seismic monitoring instruments around the southern end of Seneca Lake. The sensors, buried about two feet underground, can detect small earthquakes, train vibrations, lightning, and other sharp signals traveling through the ground.
Scientists will compare seismic readings with data from conductivity sensors on the lake bottom in hopes of capturing the source of the unexplained sounds. Some recent evidence suggests natural methane seeps could be responsible, though no direct recordings have confirmed that theory.
The instruments will remain in place for about a year as researchers collect and review data.
The Seneca Lake Pure Waters Association will also host its annual Water Quality Symposium on May 28 at Hobart and William Smith Colleges, where scientists and community members will discuss research and water quality issues affecting the lake.
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