Late quaternary geomagnetic secular variation from historical and (super 14) C-dated lava flows on Hawaii

Author:

Hagstrum, Jonathan T., Champion, Duane E.

Title:

Late quaternary geomagnetic secular variation from historical and (super 14) C-dated lava flows on Hawaii

Periodical:

Journal of Geophysical Research

Year:

1995

Volume:

100

Pages:

24393-24403

Subject:

Geology Mauna Kea Lake Waiau Geomagnetism secular variations

Summary:

A record of geomagnetic paleosecular variation (PSV) is constructed for the last 4400 years based on 188 sites in historic and (super 14)C-dated lava flows from Mauna Loa, Kilauea, and Hualalai Volcanoes on the island of Hawaii. It showed similar features to those recorded by sediments from Lake Waiau near the summit of Mauna Kea Volcano. Divergence of the inclination records with increasing age suggest that the Lake Waiau values at depths below 2 m have been affected by compaction-related inclination shallowing. The rate of PSV presented here is highly variable (less than 0.5 degrees/century to greater than 20 degrees/century), and a pronounced shift in inclination (25 to 40 degrees) occurred between ~ 1030 and ~ 975 years B.P.

Label:

Geology

Date:

1995

Collection:

Periodicals