Mata Hari – Residency
42nd sighting in Iceland
Mata Hari @38812
Jun 18 – 19, 2026 · Iceland
Herring Light, Every Year
Two glimpses this stretch, and every one of them a good sign.
40 m
Deepest dive
1:37
Longest dive
13
Dives
- Sightings
- 2
- Days between first and last sighting
- 1
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jun 18, 2026 | 53 m | 8.2°C | 25 m |
| Jun 19, 2026 | 45 m | 8.6°C | 40 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
40 m
Deepest dive
1:37
Longest dive
13
Dives
16 m
Avg dive depth
2
Sightings
1
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 (45 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jun 19, 2026
measured- Seafloor depth
- 45 m
- Sea-surface temperature
- 8.6°C
- Distance from shore
- 11.0 km
Across the residency · 2 sightings
measured- Seafloor depth
- 45 m – 53 m
- Sea-surface temperature
- 8.2°C – 8.6°C
- Distance from shore
- 8.0 km – 11.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 2 catalogued encounters on Happywhale.