A Napa firefighter inspects one of four mobile homes that were destroyed in a gas fire Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif after a preliminary 6.0-magnitude earthquake struck the San Francisco Bay area. (AP Photo/Ben Margot)     Residents of Napa and other areas of northern California rocked by August’s magnitude-6.0 earthquake probably thought the earth had come to a halt when the shaking stopped.But they’d be wrong.New satellite observations from Europe’s Sentinel-1a released at the American Geophysical Union’s annual meeting Monday show that the Napa Fault is still moving near the surface at a rate of up to an inch „over a couple of months,” and could move 2 to 6 more inches in some areas in the next three years, the BBC reports. The whole process is known as an afterslip. As the name might seem to indicate, afterslips take place after an earthquake because earth closer to the surface has a different composition than that of the earth below and doesn’t react as quickly to the fault slip as a result. „It [the earth at the surface] wasn’t able to slip that suddenly,” Ken Hudnut of the U.S. Geological Survey (USGS) told the Los Angeles Times.  „The fault is stickier — it smears instead of snapping. You can imagine it almost being like, I suppose, silly putty.”(MORE: NASA Satellites Show Dramatic Changes Here)The Sentinel-1a satellite was dispatched by the European Union just as the earthquake — the strongest to hit northern California in more than 20 years — rocked Napa and other communities. Sentinel-1a was designed to analyze Earth’s most volatile tectonic areas by taking imagery at a much more frequent rate than other satellites.The satellite captured imagery of the Napa Fault area every 12 days to come up with the measurements on its surface movement, the BBC reports. Thanks to the satellite, scientists were able to discover the afterslip sooner than ever before. Not only that, but using the satellite, the USGS was able to release a forecast for areas of the Napa Valley most likely to be impacted by the afterslip. This marks the first time the USGS has ever released a forecast for this type of movement, the Los Angeles Times notes. The Los Angeles Times said that forecast calls for the most movement in Browns Valley, California, where 20 homes are at risk for serious damage if the worst case scenario, 6 additional inches of movement, plays out. (MORE: A $50 Billion Disaster Waiting to Happen)Unfortunately, those homes have already repaired damages caused by the August quake, so homeowners will await the next forecast, set for release by the USGS in February, to find out what’s ahead for the earth beneath them. MORE ON WEATHER.COM: Indonesia 10 Years After Deadly Tsunami 2004 Indonesia Tsunami Before/After
Before/After images of Banda Aceh, Indonesia, in 2004 after the tsunami and in 2014, a decade later. (Getty Images)