Site Activity Monitor

The Site Activity Monitor is the fourth monitor on the wall of the Van, which shows the current activity ranging from 0 to 10, roughly matching the readings of an EMF Reader. A low reading may indicate little to no recent activity, while a high reading may mean high levels of ghost activity. 
On Nightmare and Insanity difficulties, the Site Activity Monitor is damaged and gives random readings, causing it to be useless and preventing players from discerning ghost activity by using it.
== Mechanics ==
The Site Activity Monitor shows an aggregate of all EMF spots in the map. For each interaction that results in an EMF reading, the level of activity shown on the monitor will increase by that corresponding level of EMF minus one, plus an additional integer modifier between -1 and +1 per interaction.
* For example, a single interaction of EMF Level 3 will correspond to an activity increase of 1, 2, or 3 on the monitor.
Higher levels usually indicate that more interactions or certain high-level activities recently took place.
During a hunt, the activity level will always be 10. However, having an activity level of 10 does not necessarily indicate that a hunt is ongoing or is about to occur; the ghost could have manifested, or simply interacted with multiple objects at once or in quick succession. Though the Site Activity Monitor only goes up to 10, the actual total amount of EMF at any one time may exceed 10. Similarly, an activity level of 0 usually, but does not always mean no activity; the ghost could have performed an EMF 2 interaction that was adjusted to show as level 0 on the monitor.
== Tips ==
Some observations from the activity monitor could help in identification of the ghost.
* A jump of 4 or 5 levels on the monitor may mean, among other things, that an EMF Level 5 interaction has occurred.
* The Twins's ability involves two interactions almost at the same time; usually 1 second apart. Seeing a non-differentiable/piecewise, positive slope (for an upwards slope), with the slope stretching across 2 seconds could indicate, among other things, this ability being used.
It is important to note that such observations are only potential indicators, and not foolproof; other events may also cause the same observations and therefore look like the above has happened. It may be appropriate to treat its usage as science; multiple observances of such indicators could more strongly suggest (but not confirm) the conclusions. Some "false positives" could include:
* A ghost event can show an activity increase of anywhere from +2 to +10 (including +4/+5), depending on the fluctuation applied and whether the event caused nearby doors to close.
* Similarly, the Poltergeist's multi-throw ability can show up as any amount of activity, depending on the number of items thrown.
* Using various cursed possessions to perform a ghost event or interaction could, other than showing up as any activity level, also cause a gradient that looks like a double interaction.
* When a hunt ends, the activity level will drop, which can look the same as an EMF 5 or a double interaction due to the ghost interacting during the hunt.
== History ==
Category:Van Equipment
fr:Moniteur d'activité
ru:Монитор активности