A magnitude ML 0.8 (quarry blast) earthquake occured in region: 1 km NW Cisano sul Neva (SV), on
and geographic coordinates (lat, lon) 44.0990, 8.1410 at 0 km depth.
The earthquake was located by: Bollettino Sismico Italiano INGV.
Event type: quarry blast.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 |
---|---|---|---|---|
Cisano sul Neva | SV | 1 | 2085 | 2085 |
Zuccarello | SV | 2 | 309 | 2394 |
Arnasco | SV | 4 | 645 | 3039 |
Balestrino | SV | 4 | 595 | 3634 |
Castelvecchio di Rocca Barbena | SV | 4 | 145 | 3779 |
Erli | SV | 5 | 245 | 4024 |
Castelbianco | SV | 5 | 330 | 4354 |
Villanova d'Albenga | SV | 6 | 2657 | 7011 |
Vendone | SV | 6 | 388 | 7399 |
Ortovero | SV | 6 | 1586 | 8985 |
Toirano | SV | 6 | 2644 | 11629 |
Ceriale | SV | 7 | 5561 | 17190 |
Boissano | SV | 8 | 2492 | 19682 |
Onzo | SV | 8 | 219 | 19901 |
Garlenda | SV | 8 | 1254 | 21155 |
Albenga | SV | 8 | 24213 | 45368 |
Borghetto Santo Spirito | SV | 8 | 4948 | 50316 |
Nasino | SV | 9 | 207 | 50523 |
Loano | SV | 10 | 11407 | 61930 |
Alassio | SV | 10 | 10934 | 72864 |
Casanova Lerrone | SV | 10 | 749 | 73613 |
Bardineto | SV | 11 | 756 | 74369 |
Alto | CN | 11 | 128 | 74497 |
Ranzo | IM | 11 | 557 | 75054 |
Aquila d'Arroscia | IM | 11 | 166 | 75220 |
Giustenice | SV | 12 | 977 | 76197 |
Pietra Ligure | SV | 13 | 8992 | 85189 |
Stellanello | SV | 13 | 808 | 85997 |
Borghetto d'Arroscia | IM | 13 | 456 | 86453 |
Testico | SV | 14 | 196 | 86649 |
Tovo San Giacomo | SV | 14 | 2582 | 89231 |
Magliolo | SV | 14 | 974 | 90205 |
Laigueglia | SV | 14 | 1810 | 92015 |
Garessio | CN | 14 | 3244 | 95259 |
Borgio Verezzi | SV | 15 | 2205 | 97464 |
Caprauna | CN | 15 | 104 | 97568 |
Villa Faraldi | IM | 15 | 444 | 98012 |
Calizzano | SV | 15 | 1475 | 99487 |
Vessalico | IM | 15 | 282 | 99769 |
Andora | SV | 16 | 7552 | 107321 |
Cesio | IM | 17 | 283 | 107604 |
Calice Ligure | SV | 17 | 1730 | 109334 |
Rialto | SV | 17 | 564 | 109898 |
Armo | IM | 18 | 111 | 110009 |
Finale Ligure | SV | 18 | 11711 | 121720 |
Chiusanico | IM | 18 | 607 | 122327 |
Diano Arentino | IM | 18 | 722 | 123049 |
Caravonica | IM | 19 | 282 | 123331 |
Pieve di Teco | IM | 19 | 1338 | 124669 |
Priola | CN | 19 | 701 | 125370 |
San Bartolomeo al Mare | IM | 19 | 3129 | 128499 |
Ormea | CN | 19 | 1617 | 130116 |
Chiusavecchia | IM | 19 | 577 | 130693 |
Cervo | IM | 19 | 1187 | 131880 |
Diano San Pietro | IM | 19 | 1145 | 133025 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
ML 0.8 | 2021-05-31 15:43:45 |
44.0993 | 8.1408 | 1 | 2021-12-29 11:12:06 |
Bollettino Sismico Italiano INGV | 91650431 |
Reviewed Rev100 |
ML 0.8 | 2021-05-31 15:43:45 |
44.1093 | 8.1053 | 6 | 2021-05-31 15:48:14 |
Sala Sismica INGV-Roma | 90666391 |
Field | Value |
---|---|
Time (UTC) | 2021-05-31 15:43:45 ± 0.38 |
Latitude | 44.0993 ± 0.0252 |
Longitude | 8.1408 ± 0.0276 |
Depth (km) | 1 (operator assigned) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-INGV |
Event type | quarry blast |
Origin ID | 91650431 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 3270 |
Semi-minor axis of confidence ellipse (meter) | 1450 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 325 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 3270.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 190 |
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) | 0.48 |
Epicentral distance of station closest to the epicenter (degree) | 0.05486 |
Epicentral distance of station farthest from the epicenter (degree) | 0.52790 |
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 | 0.8 |
Uncertainty | 0.2 |
Num. used stations | 6 |
Type of magnitude | ML |
Reference to an origin | 91650431 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2021-10-14 10:51:22 |
Field | Value |
---|---|
Value | 0.8 |
Uncertainty | 0.3 |
Num. used stations | 6 |
Type of magnitude | ML |
Reference to an origin | 90666391 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-05-31 15:48:14 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
GU.PCP.HHZ. | 2021-05-31T15:43:56.19 | 0.3 | undecidable | manual | P | 33 | 58.5969 | 90 | -0.78 | 58 |
IV.QLNO.HHZ. | 2021-05-31T15:43:51.27 | 0.3 | undecidable | manual | P | 33 | 29.8479 | 91 | 0.07 | 74 |
GU.IMI.HHZ. | 2021-05-31T15:43:50.94 | 0.3 | undecidable | manual | P | 223 | 28.8489 | 91 | -0.06 | 75 |
GU.GBOS.HHZ. | 2021-05-31T15:43:50.69 | 0.3 | undecidable | manual | P | 303 | 28.6491 | 91 | -0.28 | 71 |
GU.CANO.HHZ. | 2021-05-31T15:43:48.74 | 0.3 | undecidable | manual | P | 33 | 14.2746 | 92 | 0.65 | 66 |
GU.RORO.HHZ. | 2021-05-31T15:43:46.67 | 0.1 | undecidable | manual | P | 284 | 6.0939 | 95 | 0.22 | 100 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
GU.CANO.HHE. | ML:1.0 | 0.000124 | 0.38 | AML | other | m | 2021-05-31T15:43:51.68 |
GU.CANO.HHN. | ML:0.9 | 0.0000945 | 0.34 | AML | other | m | 2021-05-31T15:43:52.31 |
GU.GBOS.HHN. | ML:0.4 | 0.000016550000000000002 | 0.98 | AML | other | m | 2021-05-31T15:43:54.94 |
GU.GBOS.HHE. | ML:0.6 | 0.0000193 | 0.96 | AML | other | m | 2021-05-31T15:43:55.45 |
GU.IMI.HHN. | ML:0.9 | 0.00004355 | 1.24 | AML | other | m | 2021-05-31T15:43:56.63 |
GU.IMI.HHE. | ML:0.8 | 0.0000337 | 0.52 | AML | other | m | 2021-05-31T15:44:01.04 |