A creep is defined as the constant gradual land movement or surface displacement that occurs on an active fault without an earthquake.
Just across the street from the water pipe break in Hayward, you can see an offset curb that was previously displaced by a seismic creep. pic.twitter.com/9IbeRXJcIa— Vic Lee (@vicleeabc7) January 31, 2018
Sunday's pipeline breakage ripped a street on Margaret Drive and Highland Blvd, creating a large sinkhole which almost enveloped a parked car.
The intersection rests right on the Hayward fault where the maximum creep may have occurred, according to Seismologists interviewed by ABC7 News.
RELATED: Water main break floods homes in Hayward
Photographs taken prior to the pipeline break show shifted curbing on sidewalks at that location, which seismologists say were caused also by seismic creeps.
City public works said Sunday night said it didn't know why the water pipe failed, but today a spokesman for the City manager's office told ABC7 News they agree the failure was most likely caused by ground movement on the Hayward fault, possibly a creep.
That official says city workers have repaired the pipes and things are back to normal and that the water is safe to drink.
ABC7news has learned that a movement on the Hayward fault most likely caused Sunday's massive waterpipe break in Hayward. pic.twitter.com/azsdxYwC5y— Vic Lee (@vicleeabc7) January 31, 2018
Update: Repairs underway @ Highland Blvd. & Margaret Dr. after water main breaks, sinkhole forms. This is video local resident shared with ABC7News earlier; shows large amounts of water flowing down street. pic.twitter.com/fpjsfbOApR— KGO Assignment Desk (@KGOdesk) January 28, 2018
Breaking: Major Water Main break in Hayward. Water officials say 12 inch cement pipe broke this morning; torrent of water flooded street, some nearby homes and created massive sinkhole. Repairs could go into Monday. pic.twitter.com/rngUr3SAtc— KGO Assignment Desk (@KGOdesk) January 28, 2018