'Wasn't ready to get up yet': San Francisco area residents awakened by earthquake

earthquake twitter has been activated

— thanksgiving awareness account (@inthefade) August 17, 2015

An earthquake was felt in the San Francisco area this morning:

#Earthquake in the Bay Area – we are waiting for USGS to release details on magnitude

— KTVU (@KTVU) August 17, 2015

Earthquake felt in San Francisco; size, damage not immediately clear » http://t.co/Jhd8j7kdGr pic.twitter.com/fN5UafqHfC

— CNBC (@CNBC) August 17, 2015

https://twitter.com/alexismadrigal/status/633274663376785413

10 min delay system wide due to an earthquake.

— SFBARTalert (@SFBARTalert) August 17, 2015

4.2 #earthquake centered over #Piedmont .Very fast jolt w/ slight rolling motion. Lasted about 10 seconds @nbcbayarea pic.twitter.com/PeVKfH8t4G

— Jeff Ranieri (@JeffRanieri) August 17, 2015

Map by USGS shows the epicenter of this morning's earthquake was just east of San Francisco along the Hayward Fault pic.twitter.com/0UaZ1cKa88

— Mashable News (@MashableNews) August 17, 2015

#EARTHQUAKE: Magnitude 4.0 near downtown #Oakland. Felt over much of the Bay Area. pic.twitter.com/WqIIIJ24X0

— Morgan Palmer (@MorganKIRO7) August 17, 2015

No damage found to tracks or yards following small quake. All trains held for inspection and are moving again.

— SFBART (@SFBART) August 17, 2015

Many were awakened by the quake:

Damnit earthquake I wasn't ready to get up yet.

— Brad Shoemaker (@bradshoemaker) August 17, 2015

Earthquake as an alarm clock

— Julie Ann Horvath (@nrrrdcore) August 17, 2015

https://twitter.com/glassnatt/status/633276515413700609

Happy Monday! Woke up to nature's alarm clock, a 4.2 earthquake with the epicenter only 1 mile away.

— Olivia Hayward (@ManeMessage) August 17, 2015

Mini earthquake woke me up 2 early yay

— *o* (@lilvelveyvert) August 17, 2015

https://twitter.com/AlanWangABC7/status/633276020125118464

Editor’s note: This post has been updated with additional tweets.