A magnitude Md 2.1 earthquake occured in region: 4 km SW Santa Sofia (FC), on
and geographic coordinates (lat, lon) 43.9300, 11.8720 at 6 km depth.
The earthquake was located by: Bollettino Sismico Italiano INGV.
Search earthquakes: Any within 30 km radius
The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.
Municipality | Region | Distance (km) | Inhabitants | Cumulative Inhabitants |
---|---|---|---|---|
Santa Sofia | FC | 4 | 4136 | 4136 |
Galeata | FC | 8 | 2516 | 6652 |
Premilcuore | FC | 9 | 799 | 7451 |
Civitella di Romagna | FC | 10 | 3786 | 11237 |
Bagno di Romagna | FC | 12 | 6026 | 17263 |
Portico e San Benedetto | FC | 13 | 756 | 18019 |
Rocca San Casciano | FC | 15 | 1910 | 19929 |
Verghereto | FC | 18 | 1907 | 21836 |
Tredozio | FC | 20 | 1212 | 23048 |
Pratovecchio Stia | AR | 20 | 5845 | 28893 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
Md 2.1 | 1987-07-17 09:57:00 |
43.93 | 11.872 | 6 | 2013-07-15 08:40:51 |
Bollettino Sismico Italiano INGV | 52449 |
Field | Value |
---|---|
Time (UTC) | 1987-07-17 09:57:00 ± 0.216 |
Latitude | 43.9300 ± 0.0125 |
Longitude | 11.8720 ± 0.0100 |
Depth (km) | 6 ± 1 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-VAX |
Event type | earthquake |
Origin ID | 52449 |
Field | Value |
---|---|
Preferred uncertainty description | horizontal uncertainty |
Semi-major axis of confidence ellipse (meter) | |
Semi-minor axis of confidence ellipse (meter) | |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 1606.6 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 263 |
Number of associated phases, regardless of their use for origin computation | 8 |
Number of defining phases | 8 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.2 |
Epicentral distance of station closest to the epicenter (degree) | 0.00008 |
Epicentral distance of station farthest from the epicenter (degree) | 0.00931 |
Number of stations at which the event was observed | 4 |
Number of stations from which data was used for origin computation | 4 |
Field | Value |
---|---|
Value | 2.1 |
Uncertainty | |
Num. used stations | 3 |
Type of magnitude | Md |
Reference to an origin | 52449 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2013-01-04 17:50:40 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
--.ASS.Z. | 1987-07-17T09:57:36.50 | 10.0 | undecidable | manual | SG | 146 | 1.0323 | 0.31 | 0.2 | |
--.ASS.Z. | 1987-07-17T09:57:21.00 | 10.0 | undecidable | manual | PG | 146 | 1.0323 | -0.04 | 1.2 | |
--.CRE.Z. | 1987-07-17T09:57:12.97 | 10.0 | undecidable | manual | SG | 169 | 0.3108 | 0.29 | 0.3 | |
--.CRE.Z. | 1987-07-17T09:57:07.20 | 10.0 | undecidable | manual | PG | 169 | 0.3108 | -0.44 | 0.5 | |
--.PGD.Z. | 1987-07-17T09:57:05.55 | 10.0 | undecidable | manual | SG | 243 | 0.1221 | 0.04 | 0.9 | |
--.PGD.Z. | 1987-07-17T09:57:03.30 | 10.0 | undecidable | manual | PG | 243 | 0.1221 | -0.02 | 2.3 | |
--.SS9.Z. | 1987-07-17T09:57:02.49 | 10.0 | undecidable | manual | SG | 238 | 0.0111 | -0.13 | 0.9 | |
--.SS9.Z. | 1987-07-17T09:57:01.80 | 10.0 | undecidable | manual | PG | 238 | 0.0111 | 0.14 | 1.7 |