A magnitude ML 0.4 earthquake occured in region: Costa Ligure Occidentale (Imperia), on
and geographic coordinates (lat, lon) 43.9700, 7.5620 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 |
---|---|---|---|---|
Pigna | IM | 9 | 859 | 859 |
Rocchetta Nervina | IM | 9 | 298 | 1157 |
Castel Vittorio | IM | 10 | 287 | 1444 |
Olivetta San Michele | IM | 11 | 211 | 1655 |
Airole | IM | 11 | 407 | 2062 |
Isolabona | IM | 12 | 679 | 2741 |
Apricale | IM | 13 | 629 | 3370 |
Dolceacqua | IM | 14 | 2074 | 5444 |
Bajardo | IM | 15 | 312 | 5756 |
Perinaldo | IM | 15 | 870 | 6626 |
Triora | IM | 16 | 355 | 6981 |
Molini di Triora | IM | 17 | 617 | 7598 |
Soldano | IM | 18 | 977 | 8575 |
Camporosso | IM | 18 | 5632 | 14207 |
San Biagio della Cima | IM | 18 | 1329 | 15536 |
Seborga | IM | 19 | 315 | 15851 |
Vallebona | IM | 19 | 1310 | 17161 |
Ceriana | IM | 20 | 1250 | 18411 |
Briga Alta | CN | 20 | 39 | 18450 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
ML 0.4 | 2021-07-25 22:42:20 |
43.9705 | 7.5618 | 6 | 2021-12-29 11:12:17 |
Bollettino Sismico Italiano INGV | 93666621 |
Reviewed Rev100 |
ML 0.4 | 2021-07-25 22:42:20 |
43.9712 | 7.5663 | 9 | 2021-07-25 22:55:32 |
Sala Sismica INGV-Roma | 93214971 |
Field | Value |
---|---|
Time (UTC) | 2021-07-25 22:42:20 ± 0.16 |
Latitude | 43.9705 ± 0.0054 |
Longitude | 7.5618 ± 0.0087 |
Depth (km) | 6 ± 1 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-INGV |
Event type | earthquake |
Origin ID | 93666621 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 726 |
Semi-minor axis of confidence ellipse (meter) | 123 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 56 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 730.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 147 |
Number of associated phases, regardless of their use for origin computation | 12 |
Number of defining phases | 12 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.33 |
Epicentral distance of station closest to the epicenter (degree) | 0.01709 |
Epicentral distance of station farthest from the epicenter (degree) | 0.32196 |
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 | 0.4 |
Uncertainty | 0.4 |
Num. used stations | 8 |
Type of magnitude | ML |
Reference to an origin | 93214971 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-07-25 22:55:32 |
Field | Value |
---|---|
Value | 0.4 |
Uncertainty | 0.3 |
Num. used stations | 8 |
Type of magnitude | ML |
Reference to an origin | 93666621 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2021-08-04 10:55:39 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
GU.STV.HHZ. | 2021-07-25T22:42:32.95 | 0.1 | undecidable | manual | S | 328 | 35.742 | 99 | -0.61 | 82 |
GU.ENR.HHZ. | 2021-07-25T22:42:31.71 | 0.1 | undecidable | manual | S | 338 | 30.9468 | 101 | -0.19 | 92 |
GU.IMI.HHE. | 2021-07-25T22:42:30.28 | 0.3 | undecidable | manual | S | 104 | 27.2505 | 102 | -0.38 | 66 |
GU.MGRO.HHE. | 2021-07-25T22:42:28.61 | 0.1 | undecidable | manual | S | 68 | 21.2676 | 105 | 0 | 97 |
GU.BURY.HHZ. | 2021-07-25T22:42:28.22 | 0.1 | undecidable | manual | S | 181 | 20.868 | 105 | -0.28 | 92 |
GU.STV.HHZ. | 2021-07-25T22:42:28.57 | 0.1 | undecidable | manual | P | 328 | 35.742 | 99 | 0.33 | 88 |
GU.ENR.HHZ. | 2021-07-25T22:42:27.63 | 0.1 | undecidable | manual | P | 338 | 30.9468 | 101 | 0.35 | 89 |
GU.IMI.HHE. | 2021-07-25T22:42:26.52 | 0.1 | undecidable | manual | P | 104 | 27.2505 | 102 | -0.05 | 95 |
GU.MGRO.HHE. | 2021-07-25T22:42:25.63 | 0.1 | undecidable | manual | P | 68 | 21.2676 | 105 | 0.24 | 92 |
GU.BURY.HHZ. | 2021-07-25T22:42:25.55 | 0.1 | undecidable | manual | P | 181 | 20.868 | 105 | 0.23 | 93 |
FR.SAOF.HHZ.00 | 2021-07-25T22:42:23.08 | 0.1 | undecidable | manual | S | 337 | 1.8981 | 162 | -0.01 | 100 |
FR.SAOF.HHZ.00 | 2021-07-25T22:42:22.44 | 0.1 | undecidable | manual | P | 337 | 1.8981 | 162 | 0.24 | 95 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
GU.BURY.HNN. | ML:1.0 | 0.00007593701 | 0.4992 | AML | other | m | 2021-07-25T22:42:29.09 |
GU.BURY.HHE. | ML:0.4 | 0.000019771487 | 0.1792 | AML | other | m | 2021-07-25T22:42:29.25 |
GU.BURY.HNE. | ML:1.1 | 0.000088594085 | 0.6912 | AML | other | m | 2021-07-25T22:42:31.81 |
GU.BURY.HHN. | ML:0.5 | 0.000023002497 | 0.4096 | AML | other | m | 2021-07-25T22:42:31.51 |
GU.ENR.HHN. | ML:0.5 | 0.00001669406 | 0.464 | AML | other | m | 2021-07-25T22:42:31.94 |
GU.ENR.HHE. | ML:0.0 | 0.000006144638500000001 | 0.1408 | AML | other | m | 2021-07-25T22:42:32.83 |
GU.STV.HHE. | ML:0.1 | 0.0000058432985 | 1.744 | AML | other | m | 2021-07-25T22:42:33.00 |
GU.STV.HHN. | ML:0.1 | 0.000006577642 | 0.2464 | AML | other | m | 2021-07-25T22:42:33.24 |