Time lapses of Earth powered by community science.

Used by organizations worldwide to monitor the environment and inspire stewardship.
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US States

100k+

Photo submissions

600+

Active chronologs

How Chronolog Works

A chronolog photo station

Organizations set up a chronolog photo station.

A phone mounted on a chronolog photo station

A passerby aligns their phone, snaps a photo, and emails it to chronolog.

A stack of photos creating a time lapse

Their photo is automatically added to the right chronolog time lapse.

A person viewing a chronolog time lapse on their laptop

Chronologs engage your community and record environmental change.

What are chronologs monitoring?

Recent Photo Submissions


Nov 20, 2024

Photo added to 3 Sisters Pond, River Parks Authority, Oklahoma, US

3 Sisters Pond

Monitor the environment.

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Chronolog is a monitoring tool for parks, nature centers, wildlife organizations, schools, and museums worldwide. With over 100,000 contributors across 300 organizations, Chronolog is on a mission to engage communities with nature while recording important natural changes.

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