> For the complete documentation index, see [llms.txt](https://help.aranet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.aranet.com/aranet-cloud-page/aranet-cloud-landing-page/user-interface-and-core-features/alarms/alarm-history.md).

# Alarm History

The **Alarm History** tab provides a detailed log of all alarm events that have occurred in the workspace. It allows users to review past alarm activity, understand when and why alarms were triggered, and track how long each alarm remained active.

In the Alarm History tab, you can:

* View a chronological list of all alarm activations
* See timestamps for when alarms were triggered and resolved
* Identify the sensor or virtual sensor associated with each alarm
* Review status changes
* Filter and search historical alarm records for easier analysis

Alarm History is useful for reporting, as it ensures full visibility into sensor behavior and environment alarm-related events over time.

There are two trendline view types:

<div data-with-frame="true"><figure><img src="https://2831658296-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRKwQxnS51pLI9fOl4xXp%2Fuploads%2FilGtZhcCJxbJQj72AlWY%2Fimage.png?alt=media&amp;token=bbcdc7f9-d316-4b8f-9cea-096fcdf9caab" alt=""><figcaption></figcaption></figure></div>

<div data-with-frame="true"><figure><img src="https://2831658296-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRKwQxnS51pLI9fOl4xXp%2Fuploads%2FdGN75cnJgff3SKScacrq%2Fimage.png?alt=media&amp;token=0c3731a9-4415-4207-a703-253ce4c9873f" alt=""><figcaption></figcaption></figure></div>


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