Which FPCON level is activated during an increased or more predictable threat of terrorist activity?

FPCON Bravo is the correct level activated during conditions of increased or more predictable threat of terrorist activity. This level indicates that there is intelligence or other indicators that a terrorist attack is likely, though not imminent. Thus, an increase in security measures and defensive preparations is warranted, but not to the extent of a direct and immediate threat.

FPCON Alpha, on the other hand, is a lower state of readiness that signifies a general and not specific threat, while FPCON Charlie indicates a situation where there is an imminent threat, requiring immediate action and increased security measures. FPCON Delta presents the highest state of readiness and is implemented when a terrorist attack has occurred or is expected imminently, representing a response to a very serious and immediate threat.