Creep is steady fault movement, varying from continuous <>
Three types of observations are used to determine the location of the fault and indicate recency of movement. 2 0 obj
The average recurrence time for earthquakes is determined by paleoseismologists, geologists who work in trenches across the faults. 6, pages 9 through 12 for examples of what a hazard map looks like.) Step 3: Rate each hazard on a scale of 1 to 4. The map is based on the most recent USGS models for the conterminous U.S.
without any associated earthquake activity (i.e., aseismic). What do all the colors on this map mean? These warnings, watches, etc. Step 2: Identify the hazards in each area of the facility using a color-coded circle on the map. Each of these is labeled on the map in a different color. The Earth's surface is transformed by movement along active faults, producing features that help us determine the location of the fault and are diagnostic of the fault's level of activity. USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards.
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View and Obtain Flood Maps
Hazard symbol are recognizable symbols designed to warn about hazardous materials, locations, or objects, including electric currents, poisons, and other things.
(See Factsheets 3 and 4 on pages 6 and 7.)
2018 Long-term National Seismic Hazard Map. <>
Explosive (Symbol: exploding bomb) Flammable (Symbol: flame)
The symbol shows that exposure to the substance can cause severe irritation, including …
Feedback.
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Users must carefully read the explanations (sometimes called legends), all caveats, and any supplemental text accompanying a map. /MediaBox [0 0 612 792]
Locations on the map showing creep evidence are indicated by green circles.The depth of creep varies, from as little 2 miles deep in northern Oakland to as deep as 7 miles near the northern and southern ends of the fault. Please provide us feedback on watch / warning maps. (See Factsheets 3 and 4 on pages 6 and 7.) /Group <>
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The CLP hazard pictograms are very similar to those used in the old labelling system and appear in the shape of a diamond with a distinctive red border and white background. to episodic with creep events lasting minutes to days. >>
Map Symbol: Hazards Exported: 1/13/2015 5:36:28 PM Layer Category: Occupant Location Layer Description: This is a small set of symbols that indicate occupant information that may be a hazard to responders or at least a focus to manage.
CLP hazard pictograms.
Weather.gov > Weather.gov Help - Hazards Map . The FEMA Flood Map Service Center (MSC) is the official online location to find all flood hazard mapping products created under the NFIP, including your community’s flood map. monitored on the Hayward fault for forty years (Lienkaemper et al., 2001) and is also observed along some sections of other faults in the San Francisco Bay region, including the San Andreas, Calaveras, Concord-Green Valley and Maacama (Galehouse and Lienkaemper, 2003). <>
Jump to Navigation Map Symbols and Abbreviations. /StructParents 0
Creep has been Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site.
The National Weather Service issues a variety of severe weather warnings, watches, advisories, and statements.
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The use of hazard symbols is often regulated by law and directed by standards organizations. endobj
Unfortunately, this means the lower, brittle fault zone remains largely locked (i.e., it's not creeping), so it is building strain which can only be relieved by major earthquakes, which occur about every 100 to 200 years. 3 0 obj
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It must be emphasized that all the hazard information shown on the MHM, and also the base map information, are merely symbols-some conventional, others abstract, and some innovative. x��}ۏ�q���?|�3A��d�}1��];� >vb��!8�4ڝX�Ⱥ8���C��lvY,~32��J3꺱x�U���7������������~{����]~��믾���������_����S�i�,�8���������㟿��~>��8�ƌ���5�W��4�̺��w߆��o�M�oc��:P�_����S��.����~��zݙ�yۆ%(�j�/P����f��|�r��o��\���C���iʬ�]sm7�[F�>�[;�}5/ӠV������v�y�]o��>[n>r?��V�N��]��� ?M�j���T��8�Ϧ���3�&����~�����S�5g=�6k:4k����.c����ŭ��������}0�������[�n�~�57�I����/o����ѧ�������Nj��_ Generally creep occurs /ProcSet [/PDF /Text /ImageB /ImageC /ImageI]
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They document evidence of paleoearthquakes recorded in sedimentary layers, using radiocarbon analysis to date them.Locations of trenches are shown on the maps as thin blue lines and each is labeled using codes (T) and abbreviated descriptions of the evidence found in the trench.Most trenches across the Hayward fault were excavated to meet the requirements of the One or more pictograms might appear on the labelling of a single chemical. endobj
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