Alaska Petroleum Reserve Gravity Anomaly Measurements

NOAA's National Geophysical Data Center provides 53,520 gravity station records from the National Petroleum Reserve-Alaska. Data includes Free-air and Simple Bouguer Anomalies referenced to the IGSN 71 standard. This collection was compiled from various governmental and academic sources and received in November 1980.

Use Cases

• Map subsurface density variations by analyzing spatial distributions of Free-air Anomalies and Simple Bouguer Anomalies.
• Model basement depth and crustal structure within the NPRA using Bouguer anomaly values.
• Integrate gravity station data with seismic or magnetic surveys to improve geological interpretations for hydrocarbon exploration.
• Calibrate regional gravity field models using the IGSN 71-referenced observed gravity values.

Strengths

• Contains 53,520 individual gravity station records.
• Principal parameters include Free-air Anomalies and Simple Bouguer Anomalies.
• Data is referenced to the International Gravity Standardization Net 1971 (IGSN 71).

Limitations

• Data is temporally stale, with a receipt date of November 1980 and no apparent updates.
• The Simple Bouguer Anomalies have no terrain correction applied, limiting precision in rugged areas.
• Specific column definitions and original collection methodologies for all 53,520 records are not detailed.

Provenance

Source

NOAA National Geophysical Data Center, part of the 'Land and Marine Gravity Data - 1999 Edition' CD-ROM set.

Collection Method

Gathered by various governmental organizations and academia using a variety of gravity survey methods.

Time Range

Collection date unknown; data received November 1980.

Freshness

1980-01-01

Geography

National Petroleum Reserve-Alaska (NPRA).