No spike, no sharp climb: the air just sits a bit above normal. Is that missed?
Los Angeles, 20 Aug: PM2.5 drifted to about twice its usual level with no sudden jump. A slow-drift detector catches it; the spell then lasts days without another message.
White line: PM2.5 each hour. Grey: what's usual here at that hour. Click any hour to see the watch when the agent decided about it.
Nothing to say Stayed quiet: the same bad spell is still going, with nothing new to say.
Agent's note: The same bad period is continuing; nothing new to say.
EPISODE_CONTINUES · decided 8:20pm about the 6pm reading