A magnitude 4.9 earthquake struck near Boulder Creek on Thursday morning, sending moderate tremors throughout the San Francisco Bay Area.The US Geological Survey reported that the quake originated at a depth of about five miles, triggering ShakeAlert early warning alerts.Officials from the California Department of Forestry and Fire Protection confirmed that no major damage or injuries occurred following the event.Seismologists estimate a 56 percent probability of aftershocks within the next week as residents monitor the situation near the San Andreas fault.