The following Tasks assigned to the U.S. Geological Survey are numbered sequentially from the original NEHRP
Strategy Document of March 14, 1994. These Task numbers correspond with those numbers listed in parentheses following
the Selected Bibliography citations (p. 80).
| TASK |
DESCRIPTION |
| 1 |
Develop GIS hazard maps that incorporate site amplification and ground failures |
| 2 |
Support immediate seismological, geodetic, and geological fieldwork to collect perishable data from the Northridge
earthquake. |
| 3 |
Conduct quantitative inventory of damage and intensity |
| 4 |
Undertake geophysical and geological investigations of the elucidate regional fault structures |
| 5 |
Study details of the Northridge rupture process |
| 6 |
Clarify different contributions of the earthquake source from site and path effects in the strong-motion records |
| 7 |
Collect and analyze geological and geophysical data for understanding of recurrences of earthquakes in the San
Fernando Valley |
| 8 |
Analyze 3-dimensional character of the San Fernando Valley and monitor changes with geodetic surveys, such as GPS |
| 9 |
Improve broadband and strong-motion instrumentation to record larger aftershocks |
| 10 |
Conduct systematic studies of shaking amplification caused by the San Fernando sedimentary basin |
| 11 |
Undertake detailed seismic experiments to image the basin structures of the San Fernando Valley, Los Angeles, and
San Bernardino areas |
| 12 |
Study local site effects of seismic waves on a block-by-block scale |
| 13 |
Categorize local site response by shallow shear-wave velocity measurements |
| 14 |
Study and characterize nonlinear amplification of ground motion |
| 15 |
Investigate causes of high-amplitude shaking in Tarzana |
| 16 |
Examine local amplification effects at collapsed freeway sites |
| 17 |
Evaluate the role of ground failure on disruption of lifelines |
| 18 |
Produce realistic time histories of ground motions from scenario earthquakes |
| 19 |
Produce local site-response maps |
| 20 |
Produce regional seismic-hazards maps |
| 21 |
Conduct coordinated geological and geotechnical investigations to determine shaking and deformation at failed freeway
structures |
| 22 |
Determine variation of ground shaking in terms of source, propagation and site effects |
| 23 |
Evaluate the performance of earth slopes and earth-retaining structures |
| 24 |
Study the liquefaction and ground-displacement data for validating methods of predicting liquefaction hazards |
| 25 |
Study level of performance at sites where ground improvement techniques were used |
| 26 |
Investigate ground motions that contributed to the large movements in buildings |
| 27 |
Study the dynamic behavior and performance of instrumented buildings |
| 28 |
Provide data to support loss-estimation methodology |
| 29 |
Determine how effects of this earthquake influence hazard and risk maps |
| 30 |
Investigate damage and vulnerability patterns from Northridge and 1971 San Fernando earthquakes |
| 31 |
Apply econometric model for predicting losses from earthquakes in the San Fernando and Los Angeles basins |
| 32 |
Contribute to comprehensive NEHRP report on the Northridge earthquake |
| 33 |
Examine incentives for reduction of earthquake risk |
| 34 |
Improve capabilities to disseminate information in near real-time |
| 35 |
Develop documents of use to other regions regarding new insights in seismic hazards |
