Measurements of trunk circumference are taken at only a few predetermined heights up the trunk, and assume that the trunk is circular in cross-section, and that taper between measurement points is even. Also, only the volume of the trunk (including the restored volume of basal fire scars) is taken into account, and not the volume of wood in the branches or roots. The volume measurements also do not take cavities into account. For example, while studying sequoia tree canopies in 1999, researchers discovered that the Washington tree in Giant Forest Grove was largely hollow. List of largest giant sequoias by trunk volume The following table is a list of the largest giant sequoias, all of which are located in California. The table is sorted by trunk volume, ignoring wood in the branches of the tree. indicates a giant sequoia that sustained heavy fire damage after its most recent volume estimate. Notes The trees Named "Franklin", "Column", "Monroe", "Hamilton" and "Adams" were named by Wendell Flint and others. These five are now included on the official map of Giant Forest, where they are all situated. The Washington Tree (not listed above) was previously arguably the second largest tree with a volume of (although the upper half of its trunk was hollow, making the calculated volume debatable), but after losing the hollow upper half of its trunk in January 2005 following a fire, it is no longer of exceptional size. The Hazelwood Tree (not listed above) had a volume of before losing half its trunk in a lightning storm in 2002, if it were still at full size it would currently be the 17th largest giant sequoia on earth. The largest giant sequoia killed at the hand of man was Mother of the Forest or the General Noble Tree in 1892, about the same volume as the Boole Tree. The nine largest trees See also General Noble Tree List of giant sequoia groves Mother of the Forest National Register of Big Trees List of individual trees List of oldest trees List of superlative trees The House (trees) Notes References Further reading External links Sequoiadendron Sequoiadendron Giant sequoias, Largest Sequoiadendron Sequoiadendron Giant sequoias, Largest Sequoias Giant sequoias