A magnitude Md 2.1 earthquake occured in region: 4 km W Montieri (GR), on
and geographic coordinates (lat, lon) 43.1430, 10.9710 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 |
---|---|---|---|---|
Montieri | GR | 4 | 1204 | 1204 |
Castelnuovo di Val di Cecina | PI | 9 | 2231 | 3435 |
Monterotondo Marittimo | GR | 9 | 1371 | 4806 |
Chiusdino | SI | 10 | 1903 | 6709 |
Massa Marittima | GR | 12 | 8375 | 15084 |
Radicondoli | SI | 14 | 914 | 15998 |
Monticiano | SI | 17 | 1571 | 17569 |
Pomarance | PI | 19 | 5897 | 23466 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
Md 2.1 | 1987-12-11 02:00:20 |
43.143 | 10.971 | 10 | 2013-07-15 08:41:04 |
Bollettino Sismico Italiano INGV | 59519 |
Field | Value |
---|---|
Time (UTC) | 1987-12-11 02:00:20 ± 0.182 |
Latitude | 43.1430 ± 0.0082 |
Longitude | 10.9710 ± 0.0267 |
Depth (km) | 10 (operator assigned) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-VAX |
Event type | earthquake |
Origin ID | 59519 |
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) | 2354.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 161 |
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) | 0.00591 |
Epicentral distance of station farthest from the epicenter (degree) | 0.00818 |
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 | 3 |
Type of magnitude | Md |
Reference to an origin | 59519 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2013-01-04 17:56:52 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
--.PGD.Z. | 1987-12-11T02:00:51.59 | 10.0 | undecidable | manual | SG | 36 | 0.9102 | -0.36 | 0.2 | |
--.MAO.Z. | 1987-12-11T02:00:46.80 | 10.0 | undecidable | manual | SG | 169 | 0.7326 | -0.3 | 0.3 | |
--.PII.Z. | 1987-12-11T02:00:43.31 | 10.0 | undecidable | manual | SG | 330 | 0.6549 | -0.64 | 0 | |
--.PGD.Z. | 1987-12-11T02:00:38.87 | 10.0 | positive | manual | PG | 36 | 0.9102 | 0.09 | 2.9 | |
--.MAO.Z. | 1987-12-11T02:00:35.59 | 10.0 | undecidable | manual | PG | 169 | 0.7326 | 0.03 | 1.7 | |
--.PII.Z. | 1987-12-11T02:00:34.46 | 10.0 | undecidable | manual | PG | 330 | 0.6549 | 0.3 | 0.9 |