A magnitude Md 2.1 earthquake occured in region: 6 km E Marradi (FI), on
and geographic coordinates (lat, lon) 44.0980, 11.6760 at 10 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 |
---|---|---|---|---|
Marradi | FI | 6 | 3139 | 3139 |
Tredozio | FC | 6 | 1212 | 4351 |
Palazzuolo sul Senio | FI | 10 | 1154 | 5505 |
Modigliana | FC | 12 | 4560 | 10065 |
Portico e San Benedetto | FC | 12 | 756 | 10821 |
Rocca San Casciano | FC | 14 | 1910 | 12731 |
Casola Valsenio | RA | 15 | 2617 | 15348 |
Premilcuore | FC | 16 | 799 | 16147 |
Brisighella | RA | 16 | 7639 | 23786 |
Dovadola | FC | 17 | 1653 | 25439 |
Castel del Rio | BO | 19 | 1246 | 26685 |
San Godenzo | FI | 20 | 1167 | 27852 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
Md 2.1 | 1987-10-17 01:35:09 |
44.098 | 11.676 | 10 | 2013-07-15 08:41:04 |
Bollettino Sismico Italiano INGV | 57099 |
Field | Value |
---|---|
Time (UTC) | 1987-10-17 01:35:09 ± 0.338 |
Latitude | 44.0980 ± 0.0138 |
Longitude | 11.6760 ± 0.0261 |
Depth (km) | 10 (operator assigned) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-VAX |
Event type | earthquake |
Origin ID | 57099 |
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) | 2589.9 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 332 |
Number of associated phases, regardless of their use for origin computation | 6 |
Number of defining phases | 6 |
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) | 0.00194 |
Epicentral distance of station farthest from the epicenter (degree) | 0.00461 |
Number of stations at which the event was observed | 3 |
Number of stations from which data was used for origin computation | 3 |
Field | Value |
---|---|
Value | 2.1 |
Uncertainty | |
Num. used stations | 2 |
Type of magnitude | Md |
Reference to an origin | 57099 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2013-01-04 17:54:46 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
--.CRE.Z. | 1987-10-17T01:35:27.89 | 10.0 | undecidable | manual | SG | 157 | 0.5106 | -0.1 | 0.7 | |
--.CRE.Z. | 1987-10-17T01:35:19.76 | 10.0 | undecidable | manual | PG | 157 | 0.5106 | -0.39 | 0.5 | |
--.SS9.Z. | 1987-10-17T01:35:18.56 | 10.0 | undecidable | manual | SG | 144 | 0.2109 | 0.2 | 0.6 | |
--.PGD.Z. | 1987-10-17T01:35:18.50 | 10.0 | undecidable | manual | SG | 171 | 0.222 | -0.1 | 0.9 | |
--.PGD.Z. | 1987-10-17T01:35:15.00 | 10.0 | undecidable | manual | PG | 171 | 0.222 | 0.27 | 1.2 | |
--.SS9.Z. | 1987-10-17T01:35:14.67 | 10.0 | undecidable | manual | PG | 144 | 0.2109 | 0.08 | 2.1 |