Publications
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Fifth special report of the Hawaiian Volcano Observatory of the Hawaiian Volcano Research Association and the U.S. Geological Survey: Abrasion hardness
After reviewing the work of sclerometry, this paper shows that yielding and relative softness are the mechanical basis of what should be called malacometry. The experiments have been made with diamond drills, ring cuts, end millers and grinding wheels.Auerbach's "limited scope of the Mohs list" is quantitatively confirmed. The wear of diamonds is examined.A program is carried out, for rotary or an
Authors
T. A. Jaggar
Fourth special report of the Hawaiian Volcano Observatory of the U.S. Geological Survey and the Hawaiian Volcano Research Association: Steam blast volcanic eruptions: A study of Mount Pelée in Martinique as type volcano
The investigation is concerned with the author's expedition to Martinique and St. Vincent in 1902 and comparison of the experience of investigators and sufferers with that of others in so-called "explosive" eruptions. The Hawaiian mechanism is reviewed with special reference to rifts, underground water, intrusion furnace, wedge rupture, and lowering of magma. These features of structure are applie
Authors
T. A. Jaggar
Third special report of the Hawaiian Volcano Observatory of Hawaii National Park and the Hawaiian Volcano Research Association: Ash formations of the island Hawaii
The purpose of the study was to determine the areal extent of the various volcanic ash formations, to describe them petrographically and to develop means of discriminating them. The ash formations, long known in a general way, had been only casually observed by geologists. Their interpretation and separation from other surficial materials has been much retarded by great differences in the degree o
Authors
Chester K. Wentworth
The Volcano letter: A weekly news leaflet of the Hawaiian Volcano Research Association
The Volcano Letter was an informal publication issued at irregular intervals by the Hawaiian Volcano Observatory (HVO) during the years 1925 to 1955. Individual issues contain information on volcanic activity, volcano research, and volcano monitoring in Hawaii. Information on volcanic activity at other locations is also occasionally included.The Volcano Letter was published by HVO through multiple
Second report of the Hawaiian Volcano Observatory of the Massachusetts Institute of Technology and the Hawaiian Volcano Research Association: On cyclical variations in eruption at Kilauea
This work treats chiefly of observed changes in the height of stand of molten lava in the crater of Kilauea. It also takes account of concurrent variations in the apparent energy of eruptive action at the surface of the magma column. With little doubt these conditions vary in a complex periodic way.To explain these periods in part an hypothesis is advanced which depends upon recurrent astronomical
Authors
Harry O. Wood
Report of the Hawaiian Volcano Observatory of the Massachusetts Institute of Technology and the Hawaiian Volcano Research Association
The First Report of the Hawaiian Volcano Observatory is a collection of nine papers. The first provides details of the founding of the Observatory and the second reviews Kīlauea volcanic activity between 1909 and 1911. The next two papers detail the work of the Observatory by Frank Perret and E.S. Shepherd, who both arrived at Kīlauea in the summer of 1911. The third paper focuses on Perret's obse
Authors
T. A. Jaggar