Jawbone, which makes the Jawbone Up fitness tracker that measures sleep patterns, release aggregate data on its users in and near the San Francisco Bay area when the Napa earthquake hit at 3:20 AM Sunday morning. The results were reported in a company blog post.
Napa, Sonoma, Vallejo, and Fairfield — town that are less than 15 miles from the epicenter showed the biggest impact with 93% of the product’s wearers waking up suddenly at 3:20AM when the quake struck. As you move away from the center, the impact lessens. Just over half (55%) of San Francisco wearers, which is about 40 miles from American Canyon where the quake was centered woke up. Almost no wearers in Modesto and Santa Cruz woke up according to the company
And the quake’s impact on sleep lasted all night. According the Jawbone, 45% of wearers less than 15 miles from the epicenter never got back to sleep.
The company said that the study was based on thousands of UP wearers in the Bay Area who track their sleep using UP by Jawbone. All results are statistically significant. All data is anonymized and presented in aggregate.