NASA Mars Exploration Rover Status Report, October 23, 2018: The dust storm on Mars has ended and atmospheric opacity (tau) over the rover site hovers around a typical seasonal value between 1.0 and 1.1.
No signal from Opportunity has been heard since Sol 5111 (June 10, 2018). Opportunity likely experienced a low-power fault, a mission clock fault and an up-loss timer fault. The team has been listening for the rover over a broad range of times using the Deep Space Network (DSN) Radio Science Receiver since loss of signal.
In addition, more recently they have been commanding “sweep and beeps” throughout the daily DSN pass to address a possible complexity with certain conditions within mission clock fault. [More at link]