A magnitude Md 2.3 earthquake occured in region: 1 km SE Riolo Terme (RA), on
and geographic coordinates (lat, lon) 44.2710, 11.7380 at 5 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 |
---|---|---|---|---|
Riolo Terme | RA | 1 | 5720 | 5720 |
Brisighella | RA | 6 | 7639 | 13359 |
Castel Bolognese | RA | 7 | 9554 | 22913 |
Imola | BO | 9 | 69797 | 92710 |
Casalfiumanese | BO | 10 | 3438 | 96148 |
Casola Valsenio | RA | 10 | 2617 | 98765 |
Faenza | RA | 12 | 58541 | 157306 |
Borgo Tossignano | BO | 12 | 3288 | 160594 |
Solarolo | RA | 13 | 4488 | 165082 |
Dozza | BO | 13 | 6652 | 171734 |
Modigliana | FC | 13 | 4560 | 176294 |
Fontanelice | BO | 14 | 1943 | 178237 |
Bagnara di Romagna | RA | 15 | 2429 | 180666 |
Mordano | BO | 15 | 4760 | 185426 |
Castel San Pietro Terme | BO | 19 | 20811 | 206237 |
Castel Guelfo di Bologna | BO | 19 | 4455 | 210692 |
Castel del Rio | BO | 20 | 1246 | 211938 |
Castrocaro Terme e Terra del Sole | FC | 20 | 6426 | 218364 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
Md 2.3 | 1987-02-25 03:48:54 |
44.271 | 11.738 | 5 | 2013-07-15 08:41:04 |
Bollettino Sismico Italiano INGV | 41959 |
Field | Value |
---|---|
Time (UTC) | 1987-02-25 03:48:54 ± 0.516 |
Latitude | 44.2710 ± 0.0296 |
Longitude | 11.7380 ± 0.0435 |
Depth (km) | 5 (operator assigned) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-VAX |
Event type | earthquake |
Origin ID | 41959 |
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) | 4775.3 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 133 |
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) | 0.7 |
Epicentral distance of station closest to the epicenter (degree) | 0.00364 |
Epicentral distance of station farthest from the epicenter (degree) | 0.01595 |
Number of stations at which the event was observed | 5 |
Number of stations from which data was used for origin computation | 5 |
Field | Value |
---|---|
Value | 2.3 |
Uncertainty | |
Num. used stations | 3 |
Type of magnitude | Md |
Reference to an origin | 41959 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2013-01-04 17:41:42 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
--.BDI.Z. | 1987-02-25T03:49:25.50 | 10.0 | undecidable | manual | SG | 256 | 0.8325 | 1.03 | 0.4 | |
--.CTI.Z. | 1987-02-25T03:49:25.00 | 10.0 | undecidable | manual | PN | 358 | 1.7649 | -0.72 | 1 | |
--.ARV.Z. | 1987-02-25T03:49:18.50 | 10.0 | undecidable | manual | PN | 131 | 1.1544 | 1.22 | 0.7 | |
--.CRE.Z. | 1987-02-25T03:49:18.50 | 10.0 | undecidable | manual | SG | 166 | 0.666 | -0.34 | 0.8 | |
--.BDI.Z. | 1987-02-25T03:49:11.50 | 10.0 | undecidable | manual | PG | 256 | 0.8325 | -0.3 | 2 | |
--.CRE.Z. | 1987-02-25T03:49:08.00 | 10.0 | undecidable | manual | PG | 166 | 0.666 | -0.55 | 1.7 | |
--.MF9.Z. | 1987-02-25T03:49:08.50 | 10.0 | undecidable | manual | SG | 166 | 0.3996 | -1.76 | 0.1 | |
--.MF9.Z. | 1987-02-25T03:49:04.50 | 10.0 | undecidable | manual | PG | 166 | 0.3996 | 0.91 | 1.3 |