Homogenized Earthquake Catalog for Andaman-Nicobar Region (1967-2020)

A homogenized earthquake catalog in moment magnitude scale for the Andaman-Nicobar Region, covering events from 1967 to 2020. The catalog was prepared using Gaussian process regression and is truncated from the magnitude of completeness, excluding events below magnitude 4.5. It was authored by Ashis Bala and published on figshare under a CC-BY-4.0 license.

Use Cases

• Seismic hazard assessment based on homogenized moment magnitude data.
• Temporal analysis of earthquake activity based on the 1967-2020 time range.
• Spatial analysis of seismicity based on location metadata for the Andaman-Nicobar region.
• Magnitude-frequency relationship studies based on a catalog truncated at magnitude 4.5.

Strengths

• Catalog spans over 50 years, from 1967 to 2020.
• Magnitudes are homogenized to the moment magnitude scale using Gaussian process regression.
• Includes original ISC ID and metadata such as location and time.

Limitations

• Magnitudes lower than 4.5 are not available due to truncation from the magnitude of completeness.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

figshare, authored by Ashis Bala.

Collection Method

Prepared using Gaussian process regression (GPR) with teleseismic, surface wave, and body wave magnitudes as explanatory variables.

Time Range

1967 to 2020

Freshness

Last updated 2026-05-28 02:48:52; freshness should be verified.

Geography

Andaman-Nicobar Region