Ocean Floor Map

Halmahera Sea depth map

Sea: average depth about 799 m, deepest 2,746 m (GEBCO_2026 grid).

Tap or scroll to load the interactive map

Sea level todayDrag the slider to lower the sea and see the land that would appear.

Sea level in metres below today’s. A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how the water would really drain.

Key

Sea depth

  • Deeper than 6,000 m
  • 4,000 to 6,000 m
  • 2,000 to 4,000 m
  • 1,000 to 2,000 m
  • 200 to 1,000 m
  • Shallower than 200 m (the continental shelf)

Land height

  • Land up to 500 m
  • 500 to 2,000 m
  • Above 2,000 m

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  • Seabed exposed when the sea is lowered A dashed white line marks today’s coast.

How to read the map. Darker blue is deeper water. Tap anywhere to see how deep the sea is there, or how high the land is, and the nearest named undersea feature. Depths come from the GEBCO_2026 grid, which in most of the deep ocean is predicted from satellite measurements of the sea surface rather than surveyed by ship, and the map’s tiles are coarser than the grid, so narrow trenches read shallower on the map than their true depth. Not for navigation.

Halmahera Sea at a glance

  • 799 maverage depth
  • 713 mmedian depth
  • 2,746 mmaximum depth
  • 41,801 km²water area

Halmahera Sea is a sea. Inside its outline the GEBCO grid has about 41,801 km² of water, with an average depth of about 799 m (the middle value is 713 m) and a maximum of 2,746 m, found at 0.47° S, 129.24° E.

Open the map at the deepest cell and tap to read the depth.

How deep is each part of the Halmahera Sea?

The bar splits the Halmahera Sea's water by depth. Each colour is a depth band, and the shares add up to 100%.

  • 0 to 200 m: 19.4%
  • 200 to 1,000 m: 48%
  • 1,000 to 4,000 m: 32.6%
  • 4,000 to 6,000 m: 0%
  • below 6,000 m: 0%

Named features near the deepest point: Sangihe Trench (704 km), Submarine 1922 (749 km), Nieuwerkerk (849 km), Palau Trench (930 km).

The Halmahera Sea if sea level dropped

The slider on the map lowers the sea in steps. This table shows how much of the Halmahera Sea's water would be land at each step.

Sea level lowered byBecomes landShare of its water
10 m1,535 km²3.7%
20 m2,256 km²5.4%
50 m3,722 km²8.9%
80 m4,928 km²11.8%
120 m6,089 km²14.6%
200 m8,122 km²19.4%
500 m16,137 km²38.6%
1,000 m28,191 km²67.4%
2,000 m40,355 km²96.5%
3,000 m41,801 km²100%
4,000 m41,801 km²100%
6,000 m41,801 km²100%

A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.

Nearby seas

Nearest by the centre of each outline. All oceans and seas

Frequently asked questions

How deep is the Halmahera Sea?

On average about 799 m in the GEBCO grid (the middle value is 713 m). The deepest cell inside its outline is 2,746 m, at 0.47° S, 129.24° E.

How big is the Halmahera Sea?

About 41,801 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.

How much of the Halmahera Sea would be land if sea level dropped?

With the sea 10 m lower, about 1,535 km² (3.7%) of its water would be land. At 6,000 m lower, 100% would be. This is a simple bathtub model that lowers the sea evenly everywhere.

Data: depths from the GEBCO_2026 grid, statistics worked out inside the Natural Earth outline of the sea. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.

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