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Loma Prieta Earthquake Survivors Sought for USGS Felt Report Study: Preserving History, Enhancing Earthquake Preparedness


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On October 17, 1989, at 5:04 p.m., the Loma Prieta earthquake, known for its 6.9 magnitude impact, shook the San Francisco Bay Area, leaving a significant mark in the region's history. This seismic event resulted in 63 fatalities, over 3,700 injuries, and approximately 12,000 people displaced from their homes. It also caused major structural damage, including the collapse of part of the Bay Bridge and a section of the Cypress Street Viaduct in Oakland. As the 35th anniversary of this historical earthquake approaches, the United States Geological Survey (USGS) is actively seeking to gather new felt reports from surviving witnesses to enrich their understanding of its impact and to enhance earthquake preparedness for future events.

In an effort to update their database and refine seismic models, the USGS has launched an initiative inviting individuals who experienced the Loma Prieta earthquake to provide first-hand accounts through their “Did You Feel It?” program. This crowd-sourced data collection effort allows residents from the affected areas to submit observations, such as their location during the quake, the intensity of shaking they felt, and any damages they witnessed. These felt reports are invaluable for improving the accuracy of seismic intensity maps and understanding human perception of ground shaking. Originally started to gather real-time reactions to ongoing seismic activity, the USGS sees revisiting the Loma Prieta earthquake as crucial for retrospective analysis.

To make this initiative more inclusive and widely accessible, the “Did You Feel It?” program is available in multiple languages. This move is significant in reaching a more diverse set of respondents, honoring the multicultural demographics of the Bay Area. The collection of such rich, diverse narratives not only adds depth to scientific inquiry but also serves as a way to preserve the collective memory of those impacted by the disaster. Moreover, by understanding the varying impacts on different communities, emergency preparedness and response strategies can be tailored to meet specific needs and vulnerabilities.

The lessons learned from the Loma Prieta earthquake have already informed many improvements in building codes, infrastructure resilience, and emergency response protocols. However, the current call for felt reports is a testament to the ever-present need to expand our knowledge base and integrate historical data with advances in technology. Through gathering personal accounts, the USGS can gain insights into patterns of seismic activity and human experiences that may have been overlooked or inadequately documented at the time of the earthquake.

In summary, the call from the USGS for new Loma Prieta earthquake reports is more than just a scientific endeavor; it's a step toward community engagement and historical documentation. By participating, people can contribute to a body of data that is critical for urban planning, education, and the development of technologies aimed at reducing seismic risk. As we reflect on the past 35 years since Loma Prieta, this initiative underscores the importance of history, collective knowledge, and the power of shared experiences in crafting a safer future for all communities in earthquake-prone regions.
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