<descriptor thcode="61"><thesaurus thcode="61" name="Marine Realms Information Bank (MRIB) keywords" scope="Theme keywords from the former Marine Realms Information Bank, focusing on characteristics of coasts and oceans, processes acting on them, and human concerns about them." creator="U.S. Geological Survey" rights="Public domain" date="2016-09-07" codetype="number" prefix="mrib" tblname="mrib" nonpref="mribnp" relterm="mribrt" root_code="1" contact="aallwardt"><category><term thcode="25" code="27" name="types" parent="26" scope="Terms are types of things rather than named instances"/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="5" name="theme" parent="2" scope="Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."/><term thcode="25" code="21" name="disciplines" parent="2" scope="Broad categories of human inquiry or activity, such as scientific disciplines."/><term thcode="25" code="20" name="methods" parent="2" scope="Actions taken to obtain or analyze information"/><term thcode="25" code="27" name="types" parent="26" scope="Terms are types of things rather than named instances"/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="5" name="theme" parent="2" scope="Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."/><term thcode="25" code="21" name="disciplines" parent="2" scope="Broad categories of human inquiry or activity, such as scientific disciplines."/><term thcode="25" code="20" name="methods" parent="2" scope="Actions taken to obtain or analyze information"/></category><altlabel><altlabel>MRIB keywords</altlabel><altlabel>MRIB keywords</altlabel><altlabel>Marine Realms Information Bank keywords</altlabel><altlabel>Marine Realms Information Bank keywords</altlabel></altlabel></thesaurus><term thcode="61" code="323" name="hazards and disasters" parent="268" scope="used for natural hazards, the risks they pose to society, and the destructive events that may result."/><uf><usefor name="hazards"/></uf><bt><term thcode="61" code="268" name="hot topics" parent="1"/><term thcode="61" code="1" name="Marine Realms Information Bank (MRIB) keyword categories"/></bt><nt><term thcode="61" code="324" name="biological disasters" parent="323" scope="an event harming organisms that are directly or indirectly important to humans."/><term thcode="61" code="327" name="disaster preparation" parent="323" scope="preemptive efforts to minimize the effects of an impending disaster."/><term thcode="61" code="328" name="disaster reconstruction" parent="323" scope="efforts to rebuild and redevelop an area devastated by a disaster."/><term thcode="61" code="329" name="disaster recovery" parent="323" scope="efforts to ameliorate the effects of a disaster after it occurs."/><term thcode="61" code="330" name="disaster response" parent="323" scope="efforts to minimize the effects of a disaster while or immediately after it occurs."/><term thcode="61" code="331" name="earthquakes" parent="323" scope="the sudden release of crustal stress resulting in seismic shaking."/><term thcode="61" code="334" name="erosion" parent="323" scope="the natural removal of earth materials from any part of the Earth's surface (subaerial or submarine), with an emphasis on the consequences for humans and infrastructure."/><term thcode="61" code="342" name="fires" parent="323" scope="the loss of life, property, or natural resources due to fire."/><term thcode="61" code="343" name="floods" parent="323" scope="the loss of life, property, or natural resources due to a body of water exceeding its &quot;usual&quot; bounds."/><term thcode="61" code="344" name="hazard mitigation" parent="323" scope="efforts to lessen or eliminate the potential impact of a natural hazard before a disaster occurs."/><term thcode="61" code="347" name="impacts of agricultural activities" parent="323" scope="the effects of agriculture, including alteration or destruction of natural ecosystems, nutrient and pesticide runoff, and changes to soil and aquatic chemistry."/><term thcode="61" code="348" name="landslides" parent="323" scope="the mass movement of surficial materials or rock resulting in the loss of life, property, or natural resources."/><term thcode="61" code="351" name="meteorite impact" parent="323" scope="used for the local and/or global consequences of a meteorite striking the Earth's surface."/><term thcode="61" code="352" name="spills" parent="323" scope="unintended release of a toxin or pollutant during transport, processing, or use."/><term thcode="61" code="355" name="storm disasters" parent="323" scope="a storm that causes loss of life, property, or natural resources."/><term thcode="61" code="357" name="tsunami events" parent="323" scope="disastrous, flooding waves produced by submarine earthquakes or landslides."/><term thcode="61" code="358" name="volcanic eruptions" parent="323" scope="used for eruptions of lava or ash that cause loss of life, property, or natural resources; disrupt economic activity or transportation; or cause secondary lahars (volcanic mudflows)."/></nt></descriptor>