{"id":225450,"date":"2025-06-09T13:34:38","date_gmt":"2025-06-09T17:34:38","guid":{"rendered":"https:\/\/ibkrcampus.com\/campus\/?post_type=glossary-terms&#038;p=225450"},"modified":"2025-06-09T13:34:39","modified_gmt":"2025-06-09T17:34:39","slug":"us-geological-survey-usgs-earthquake-magnitude","status":"publish","type":"glossary-terms","link":"https:\/\/www.interactivebrokers.com\/campus\/glossary-terms\/us-geological-survey-usgs-earthquake-magnitude\/","title":{"rendered":"US Geological Survey (USGS) Earthquake Magnitude"},"content":{"rendered":"\n<p>The U.S. Geological Survey (USGS) measures earthquake activity using several metrics, including magnitude and intensity. Magnitude (such as the commonly used Richter or moment magnitude scales) measures the amount of energy released at the earthquake&#8217;s source, while intensity refers to the observed effects on people, structures, and the natural environment, usually recorded using the Modified Mercalli Intensity (MMI) scale.<br><br>Magnitude is a logarithmic measure, meaning each whole number increase represents roughly 32 times more energy release. For example, a magnitude 6.0 earthquake releases over 30 times the energy of a 5.0 quake. Meanwhile, intensity is a subjective measure varying by location and is affected by factors like distance from the epicenter, geology, and building resilience. It captures human perception and visible damage, making it important for emergency management and civil engineering.<br><br>The USGS provides real-time seismic data, hazard maps, and risk assessments used by governments, engineers, insurers, and researchers. Its ShakeMap and PAGER systems provide immediate data on expected shaking and potential losses after a major event. These tools help coordinate emergency responses, prioritize resources, and improve building codes and zoning regulations in earthquake-prone regions of the U.S. and globally.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The U.S. Geological Survey (USGS) measures earthquake activity using several metrics, including magnitude and intensity. <\/p>\n","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"traders-glossary":[13278,13251,13264],"class_list":{"0":"post-225450","1":"glossary-terms","2":"type-glossary-terms","3":"status-publish","5":"traders-glossary-ibkr-traders-glossary","6":"traders-glossary-trading-alphabet","7":"traders-glossary-trading-terms-u"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.3) - 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