A magnitude Md 2.3 earthquake occured in region: Costa Toscana settentrionale (Massa Carrara, Lucca, Pisa), on
and geographic coordinates (lat, lon) 43.9630, 9.8330 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 |
---|---|---|---|---|
Portovenere | SP | 10 | 3630 | 3630 |
Lerici | SP | 14 | 10228 | 13858 |
Ameglia | SP | 15 | 4365 | 18223 |
La Spezia | SP | 16 | 93959 | 112182 |
Riomaggiore | SP | 17 | 1576 | 113758 |
Arcola | SP | 18 | 10607 | 124365 |
Sarzana | SP | 20 | 21976 | 146341 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
Md 2.3
ML-VAX 1.8 |
1987-10-19 10:22:30 |
43.963 | 9.833 | 5 | 2013-07-15 08:41:04 |
Bollettino Sismico Italiano INGV | 57199 |
Field | Value |
---|---|
Time (UTC) | 1987-10-19 10:22:30 ± 0.245 |
Latitude | 43.9630 ± 0.0214 |
Longitude | 9.8330 ± 0.0228 |
Depth (km) | 5 (operator assigned) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-VAX |
Event type | earthquake |
Origin ID | 57199 |
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) | 2993.6 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 171 |
Number of associated phases, regardless of their use for origin computation | 7 |
Number of defining phases | 7 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.5 |
Epicentral distance of station closest to the epicenter (degree) | 0.00494 |
Epicentral distance of station farthest from the epicenter (degree) | 0.01732 |
Number of stations at which the event was observed | 6 |
Number of stations from which data was used for origin computation | 6 |
Field | Value |
---|---|
Value | 2.3 |
Uncertainty | |
Num. used stations | 3 |
Type of magnitude | Md |
Reference to an origin | 57199 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2013-01-04 17:54:52 |
Field | Value |
---|---|
Value | 1.8 |
Uncertainty | |
Num. used stations | 3 |
Type of magnitude | ML |
Reference to an origin | 57199 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2015-04-28 13:07:13 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
--.DOI.Z. | 1987-10-19T10:23:04.11 | 10.0 | undecidable | manual | PN | 287 | 1.9203 | 0.34 | 1.1 | |
--.BOB.Z. | 1987-10-19T10:23:00.67 | 10.0 | undecidable | manual | SG | 341 | 0.8436 | 0.11 | 0.7 | |
--.CRE.Z. | 1987-10-19T10:22:59.28 | 10.0 | undecidable | manual | PN | 102 | 1.5651 | 0.52 | 0.9 | |
--.CKI.Z. | 1987-10-19T10:22:53.89 | 10.0 | undecidable | manual | PN | 293 | 1.1988 | 0.1 | 1.7 | |
--.BOB.Z. | 1987-10-19T10:22:47.15 | 10.0 | undecidable | manual | PG | 341 | 0.8436 | -0.68 | 0.8 | |
--.MME.Z. | 1987-10-19T10:22:44.90 | 10.0 | undecidable | manual | PG | 69 | 0.6549 | 0.51 | 1.2 | |
--.PII.Z. | 1987-10-19T10:22:41.50 | 10.0 | undecidable | manual | PG | 116 | 0.5439 | -0.84 | 0.5 |