Monterey Bay Aquarium Research Institute

Mapping Program

Mahukona Survey

The Mahukona survey is located west of the north Kona coast on Hawaii and shows a large area named the Kohala Terrace. We have called it the Mahukona survey for the submarine volcano that forms the western part of the survey area. This area is characterized by a stairstep series of drowned coral reefs that date from as recent as 15,000 years ago, for the shallowest reef at 150-meters depth, to as old as 465,000 years for a reef near the break-in-slope (Clague and Moore, 1991). The new bathymetry and sidescan allow us to determine the distribution of these reefs much more accurately than was previously possible (Clague et al., 1998). 

The new data show that the series of reefs were progressively tipped toward the southeast as the island of Hawaii grew. The images also reveal several, previously unknown, submarine eruptive fissures and lava flows that drape the different reefs. These fissures are probably radial vents from Mauna Loa Volcano. The western rift zone of Mahukona Volcano is characterized by numerous flat-topped circular volcanic cones, similar in form to those on the flanks of Ni`ihau. In addition, several pointed cones, including one that is about 650 meters tall, occur along the rift zone. The large pointed cone is constructed of alkalic basalt (Garcia et al., 1990; Clague and Moore, 1991), and probably erupted during the post-shield stage.

Survey Detail

mahukonamap.jpg (308249 bytes)

Data locations listed below, or click on name to download.

MBARI provides these data "as is", with no warranty, express or implied, of the data quality or consistency. Data are provided without support and without obligation on the part of the Monterey Bay Aquarium Research Institute to assist in its use, correction, modification, or enhancement.

(Grid Cell Size)
Grid Sun Illuminated Image Acoustic Reflectivity Image
(at 1/2 grid cell size)
mahukonaa 30meters grids\mahukonaa.asc.gz geoTIFFS\sunshade\mahukonaa.tif geoTIFFS\backscatter\mahukonaa.tif
mahukonab 20meters grids\mahukonab.asc.gz geoTIFFS\sunshade\mahukonab.tif geoTIFFS\backscatter\mahukonab.tif
mahukonac 10meters grids\mahukonac.asc.gz geoTIFFS\sunshade\mahukonac.tif geoTIFFS\backscatter\mahukonac.tif
mahukonad 10meters grids\mahukonad.asc.gz geoTIFFS\sunshade\mahukonad.tif geoTIFFS\backscatter\mahukonad.tif
mahukonae 10meters grids\mahukonae.asc.gz geoTIFFS\sunshade\mahukonae.tif geoTIFFS\backscatter\mahukonae.tif
mahukonaf 3meters grids\mahukonaf.asc.gz geoTIFFS\sunshade\mahukonaf.tif geoTIFFS\backscatter\mahukonaf.tif
mhkn2khlb 3meters grids\mhkn2khlb.asc.gz geoTIFFS\sunshade\mhkn2khlb.tif geoTIFFS\backscatter\mhkn2khlb.tif

Click on thumbnail to view larger image

Map view 1

Map view 2

Oblique view 1

Oblique view 2

Index Map Haleakala Hilo Kohala Loihi Mahukona Moloka`i Ni`ihau Papa`u Puna Ridge
Last updated: Oct. 02, 2013