Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Chatham Strait

Miasma – Residency

5th sighting in Chatham Strait
Fluke of Miasma
Miasma Confirmed in the catalog @6361
Aug 16 – Sep 19, 2020 · Chatham Strait

Chatham Strait · Aug – Sep 2020

52 m
Deepest dive
2:15
Longest dive
64
Dives
Sightings
4
Days between first and last sighting
34

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Aug 16, 202039 m—33 m
Sep 18, 202064 m—52 m
Sep 18, 202064 m—47 m
Sep 19, 202060 m—47 m

Seafloor and sea temperature measured · ✳ dives modelled

Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors

Deepest dive against the seafloor, per sighting

Seafloor · measured Deepest dive · modelled
Aug 16, 2020 — seafloor 39 m (measured), deepest dive 33 m (modelled)Aug 16Sep 18, 2020 — seafloor 64 m (measured), deepest dive 52 m (modelled)Sep 18Sep 18, 2020 — seafloor 64 m (measured), deepest dive 47 m (modelled)Sep 18Sep 19, 2020 — seafloor 60 m (measured), deepest dive 47 m (modelled)Sep 19

Depth runs down from the surface. The modelled dive never passes the measured seafloor at that sighting.

Dives

52 m
Deepest dive
2:15
Longest dive
64
Dives
21 m
Avg dive depth
4
Sightings
34
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010052 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (64 m) and the published dive-behaviour distribution. Modelled, not measured.

Deep Effort Score

Deep

Depth, duration and recovery resolved into a single number for this session.

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Place

Where this happened · Sep 18, 2020

measured
Seafloor depth
64 m
Sea-surface temperature
—
Distance from shore
5.0 km

Across the residency · 4 sightings

measured
Seafloor depth
39 m – 64 m
Sea-surface temperature
—
Distance from shore
5.0 km – 6.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors

Source records

This activity is assembled from 4 catalogued encounters on Happywhale.

Sighting records from Happywhale, published as occurrence data via GBIF. Individual records are licensed CC0 1.0, CC BY 4.0 or CC BY-NC 4.0, depending on the contributor.

The photographs and fluke identifications behind every sighting are the work of the contributing observers — the citizen scientists, naturalists and operators who logged them, each named in the underlying GBIF occurrence record. Every activity links out to its source encounters on Happywhale. Basemaps © OpenStreetMap contributors (ODbL).

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Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.