Flight Crew Last 90 Days 295; Flight Crew Type 6000
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Took Evasive Action
Environment - Non Weather Related
[We were on the] SADDE Arrival to LAX descending from approximately 12;000 FT to 10;000 FT approaching BAYST Intersection; encountered moderate and greater wake turbulence. The Captain (pilot flying) took the aircraft out of LNAV and used HDG SEL to offset from procedure track. This resulted in a late turn to the west at BAYST. Due to frequency congestion and cockpit workload; this happened before I could coordinate with ATC. Controller said we were behind an EMB-170 but the wake was intense. I suspect it was from an A-340 that was ahead of the EMB-170.
B737-700 First Officer reported 'moderate and greater' wake turbulence in trail of an EMB-170 and an A340. Captain turned off course to minimize the wake effect and they deviated from the assigned track.