A magnitude six earthquake shook the Napa Valley and Northern California on Sunday, damaging buildings and disrupting power. Jawbone, creator of the Up fitness tracker, today released data revealing the number of users who were woken up in the middle of the night.

The graph (below) visualizes the percentage of Up wearers who were awake between 9pm and 9am. Areas that were distanced further from the quake, such as Modesto and Santa Cruz, were barely affected, while closer regions, including Napa, Sonoma and Vallejo, rocketed skyward after 3:20am PT.

Screen Shot 2014 08 25 at 13.16.20 730x342 Jawbone reveals how many Up users were woken up by the Napa earthquake

“Once [awake], it took the residents a long time to go back to sleep, especially in the areas that felt the shaking the strongest,” Eugene Mandel, a Senior Data Engineer for Jawbone said. “In fact, 45 percent of Up wearers less than 15 miles from the epicenter stayed up the rest of the night.”

While the findings aren’t too surprising, it’s a notable reminder of the insightful data companies such as Jawbone are able to collect from their users.

Jawbone (via The Verge)

Featured image credit: NICHOLAS KAMM/AFP/Getty Images