The device, called an imaging spectrometer, has identified more than 50 methane "super-emitters" in Central Asia, the Middle East and the Southwestern United States since it was installed in July aboard the International Space Station, NASA said on Tuesday.
The newly measured methane hotspots - some previously known and others just discovered - include sprawling oil and gas facilities and large landfills.
"Some of the (methane) plumes EMIT detected are among the largest ever seen - unlike anything that has ever been observed from space," said Andrew Thorpe, a JPL research technologist leading the methane studies.
Examples of newly imaged methane super-emitters showcased by JPL on Tuesday included a cluster of 12 plumes from oil and gas infrastructure in Turkmenistan, some plumes stretching more than 20 miles (32 km).
EMIT, one of 25 Earth science instruments in orbit, could potentially find hundreds of methane super-emitters before its year-long mission ends, NASA said.