Ayear and a half after directly experiencing a san francisco earthquake, people had very accurate recall of where they had been and what they were doing at the time of the earthquake. their recall best illustrates memory.

The correct answer is flashbulb memory. 

Flashbulb memory refers to a long-term memory that is highly vivid and detailed. These types of memories can last for years and even an entire lifetime for individuals. Flashbulb memories are highly vivid and detailed because they are usually regarding major autobiographical events in an individual's life (such as experiencing a natural disaster like an earthquake or winning a highly prestigious award).