Quartz – Residency
17th sighting in Johnstone Strait & Broughton
Quartz @11261
Jul 27 – Sep 23, 2025 · Johnstone Strait & Broughton
Johnstone Strait & Broughton · Jul – Sep 2025
79 m
Deepest dive
2:53
Longest dive
35
Dives
- Sightings
- 4
- Days between first and last sighting
- 58
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 27, 2025 | 71 m | 14.1°C | 59 m |
| Aug 4, 2025 | 87 m | 15.1°C | 79 m |
| Sep 12, 2025 | 80 m | 15.1°C | 35 m |
| Sep 23, 2025 | 134 m | 13.4°C | 63 m |
Seafloor and sea temperature measured · ✳ dives modelled
Deepest dive against the seafloor, per sighting
Seafloor · measured Deepest dive · modelledDepth runs down from the surface. The modelled dive never passes the measured seafloor at that sighting.
Dives
79 m
Deepest dive
2:53
Longest dive
35
Dives
22 m
Avg dive depth
4
Sightings
58
Days first → last
Dive metrics are modelled within real depth limits — not measured
Get actual dive data with Risa Deep →Dive profile
modelledDepth shaped by the seafloor limit here (87 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 4, 2025
measured- Seafloor depth
- 87 m
- Sea-surface temperature
- 15.1°C
- Distance from shore
- 1.0 km
Across the residency · 4 sightings
measured- Seafloor depth
- 71 m – 134 m
- Sea-surface temperature
- 13.4°C – 15.1°C
- Distance from shore
- 1.0 km – 2.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 4 catalogued encounters on Happywhale.