International Geomagnetic Reference Field Revision 1987

Predicting the Multifractal Geomagnetic Field

The geomagnetic field at the Earth’s surface is determined by a large number of current sources, internal and external, which vary at overlapping time scales. As a result, the time variation of the field, ranging from nHz to tens of Hz, can be modeled as a multifractal whose properties depend on frequency and activity level, with the latter being largely determined by the external driving due t...

Geomagnetic field behavior during the Iceland Basin and Laschamp geomagnetic excursions: A simple transitional field geometry?

[1] We present four new records of the Iceland Basin Excursion (IBE) and five new records of the Laschamp Excursion (LE) obtained from rapidly deposited marine sediments in the North Atlantic Ocean, the Nordic Seas, the Gulf of Mexico, the South China Sea, and the southern Indian Ocean. Marked minima in relative paleointensity correspond with the paleomagnetic directional changes associated wit...

DataWatch International Health Care Expenditure Trends: 1987

Atlas of International Relationship Networks (1987)

Review of the problems of mapping networks of organization/problem relationships in order to produce an "Atlas" as a complement to the Yearbook of International Organizations and to the Encyclopedia of World Problems and Human Potential Rendered searchable by OCR, but recognition errors may prevent this in some cases. PHP variant (incomplete tables) SUMMARY 1. This document is concerned with pr...

Revision of the genus Ctenophilothis Kryzhanovskij, 1987 (Coleoptera: Histeridae: Saprininae).

The Saharan genus Ctenophilothis Kryzhanovskij, 1987 is revised. Its two species, C. chobauti (Th6ry, 1900) and C. altus (Lewis, 1885), differ mainly by the shape of their mandibles, protibia, and elytral striae. Ctenophilothis is likely a monophyletic genus known so far only from the Algerian, Moroccan, and Egyptian Sahara. The neotype of C. chobauti and lectotype of C. altus are designated. T...