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

Chalkboard – Residency

Fluke of Chalkboard
Chalkboard Confirmed in the catalog @24276
Oct 5 – Nov 11, 2020 · North Pacific

North Pacific · Oct – Nov 2020

173 m
Deepest dive
5:05
Longest dive
83
Dives
Sightings
8
Days between first and last sighting
37
Deepest dive on record
173 m · this residency

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Oct 5, 2020619 m—173 m
Oct 9, 2020709 m—112 m
Oct 10, 2020555 m—114 m
Oct 11, 2020640 m—44 m
Oct 13, 2020374 m—39 m
Oct 16, 202049 m—29 m
Oct 19, 2020725 m—90 m
Nov 11, 2020876 m—64 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
Oct 5, 2020 — seafloor 619 m (measured), deepest dive 173 m (modelled)Oct 5Oct 9, 2020 — seafloor 709 m (measured), deepest dive 112 m (modelled)Oct 9Oct 10, 2020 — seafloor 555 m (measured), deepest dive 114 m (modelled)Oct 10Oct 11, 2020 — seafloor 640 m (measured), deepest dive 44 m (modelled)Oct 11Oct 13, 2020 — seafloor 374 m (measured), deepest dive 39 m (modelled)Oct 13Oct 16, 2020 — seafloor 49 m (measured), deepest dive 29 m (modelled)Oct 16Oct 19, 2020 — seafloor 725 m (measured), deepest dive 90 m (modelled)Oct 19Nov 11, 2020 — seafloor 876 m (measured), deepest dive 64 m (modelled)Nov 11

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

Dives

173 m
Deepest dive
5:05
Longest dive
83
Dives
31 m
Avg dive depth
8
Sightings
37
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0100200173 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (619 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.

Unlock with Risa Deep

Place

Where this happened · Oct 5, 2020

measured
Seafloor depth
619 m
Sea-surface temperature
—
Distance from shore
8.0 km

Across the residency · 8 sightings

measured
Seafloor depth
49 m – 876 m
Sea-surface temperature
—
Distance from shore
3.0 km – 18.0 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 8 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).

Happywhale runs on donations: support Happywhale →

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