Table 2 Residuals between fully reviewed events (flag “K”) in the JMA catalog and their corresponding automatically processed hypocenters by the PF method: a averages (ave.) and standard deviations (σ), b proportions of automatically processed hypocenters within 1 and 5 km and 0.1 and 0.5 units of the fully reviewed hypocentral location and magnitude in the JMA unified catalog, respectively
From: Evaluation of automatic hypocenter determination in the JMA unified catalog
Latitude (km) | Longitude (km) | Depth (km) | Magnitude | |||||
|---|---|---|---|---|---|---|---|---|
ave. | σ | ave. | σ | ave. | σ | ave. | σ | |
a | ||||||||
All events | 0.21 | 4.31 | 0.10 | 4.03 | 0.13 | 8.57 | − 0.01 | 0.15 |
Shallow inland | 0.17 | 3.29 | − 0.25 | 3.25 | − 0.09 | 4.16 | − 0.02 | 0.15 |
Deep/offshore | 0.24 | 4.80 | 0.30 | 4.40 | 0.25 | 10.28 | − 0.01 | 0.14 |
Latitude | Longitude | Depth | Magnitude | |||||
|---|---|---|---|---|---|---|---|---|
< 1 km (%) | < 5 km (%) | < 1 km (%) | < 5 km (%) | < 1 km (%) | < 5 km (%) | < 0.1 unit (%) | < 0.5 unit (%) | |
b | ||||||||
All events | 72.6 | 93.0 | 67.7 | 91.9 | 52.6 | 85.7 | 84.5 | 99.1 |
Shallow inland | 88.8 | 95.9 | 88.9 | 96.3 | 67.2 | 94.4 | 85.4 | 98.9 |
Deep/offshore | 63.3 | 91.4 | 55.5 | 89.4 | 44.3 | 80.8 | 84.0 | 99.2 |