Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 25-12-1993 and time 22:50:38 (UTC) in region SW Calizzano (SV)

A magnitude Md 2.3 earthquake occured in region: SW Calizzano (SV), on

  • 25-12-1993 22:50:38 (UTC)
  • 25-12-1993 23:50:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2340, 8.1140 at 3 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Calizzano SV 0 1475 1475
Bardineto SV 5 756 2231
Priola CN 7 701 2932
Garessio CN 8 3244 6176
Massimino SV 8 113 6289
Osiglia SV 9 444 6733
Bagnasco CN 10 1035 7768
Murialdo SV 10 841 8609
Erli SV 11 245 8854
Bormida SV 11 387 9241
Perlo CN 11 116 9357
Castelvecchio di Rocca Barbena SV 11 145 9502
Magliolo SV 12 974 10476
Giustenice SV 13 977 11453
Battifollo CN 13 219 11672
Nucetto CN 13 430 12102
Balestrino SV 13 595 12697
Rialto SV 13 564 13261
Viola CN 13 391 13652
Castelnuovo di Ceva CN 13 110 13762
Lisio CN 13 201 13963
Zuccarello SV 14 309 14272
Castelbianco SV 14 330 14602
Tovo San Giacomo SV 14 2582 17184
Boissano SV 14 2492 19676
Toirano SV 14 2644 22320
Calice Ligure SV 15 1730 24050
Nasino SV 15 207 24257
Scagnello CN 15 194 24451
Roccavignale SV 16 752 25203
Priero CN 16 529 25732
Mallare SV 16 1146 26878
Montezemolo CN 16 259 27137
Millesimo SV 16 3383 30520
Loano SV 16 11407 41927
Alto CN 16 128 42055
Cisano sul Neva SV 16 2085 44140
Pietra Ligure SV 17 8992 53132
Pamparato CN 17 302 53434
Pallare SV 17 923 54357
Borghetto Santo Spirito SV 17 4948 59305
Orco Feglino SV 17 890 60195
Arnasco SV 17 645 60840
Plodio SV 17 650 61490
Borgio Verezzi SV 17 2205 63695
Monasterolo Casotto CN 18 89 63784
Ceriale SV 18 5561 69345
Cosseria SV 18 1105 70450
Vendone SV 18 388 70838
Caprauna CN 18 104 70942
Ceva CN 18 5782 76724
Sale delle Langhe CN 18 486 77210
Mombasiglio CN 18 609 77819
Sale San Giovanni CN 19 183 78002
Aquila d'Arroscia IM 19 166 78168
Ormea CN 19 1617 79785
Onzo SV 19 219 80004
Cengio SV 19 3563 83567
Roburent CN 20 495 84062
Finale Ligure SV 20 11711 95773
Vezzi Portio SV 20 809 96582
Carcare SV 20 5587 102169
Ortovero SV 20 1586 103755

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of Savona (61345 inhabitants)
48 Km E of Cuneo (56081 inhabitants)
53 Km NE of Sanremo (54807 inhabitants)
68 Km W of Genova (586655 inhabitants)
74 Km S of Asti (76202 inhabitants)
85 Km SW of Alessandria (93943 inhabitants)
92 Km SE of Moncalieri (57294 inhabitants)
100 Km SE of Torino (890529 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 2.3
M 3.4 		1993-12-25
22:50:38		 44.234 8.114 3 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 202819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-12-25 22:50:38 ± 0.197
Latitude 44.2340 ± 0.0107
Longitude 8.1140 ± 0.0149
Depth (km) 3 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 202819

Uncertainty

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) 1678.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
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) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.03926
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 202819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:10:44

M:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 202819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:48:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.HAU.Z. 1993-12-25T22:52:25.80 10.0 undecidable manual SN 342 3.9516 0.78 0.2
--.BGF.Z. 1993-12-25T22:51:46.80 10.0 undecidable manual PN 304 4.3623 1.35 0.2
--.HAU.Z. 1993-12-25T22:51:40.40 10.0 undecidable manual PN 342 3.9516 0.48 0.7
--.VAI.Z. 1993-12-25T22:51:31.77 10.0 undecidable manual SN 15 1.6872 0.65 0.4
--.LPG.Z. 1993-12-25T22:51:29.80 10.0 undecidable manual SN 323 1.5762 1.2 0.2
--.LRG.Z. 1993-12-25T22:51:26.20 10.0 undecidable manual SN 239 1.4874 0.09 0.6
--.LMR.Z. 1993-12-25T22:51:25.40 10.0 undecidable manual SN 232 1.4652 -0.27 0.6
--.ORO.Z. 1993-12-25T22:51:24.56 10.0 undecidable manual SN 356 1.3875 0.58 0.5
--.FRF.Z. 1993-12-25T22:51:20.10 10.0 undecidable manual SN 238 1.2543 -0.5 0.6
--.MDI.Z. 1993-12-25T22:51:12.50 10.0 undecidable manual PN 35 1.9092 0.75 0.9
--.VAI.Z. 1993-12-25T22:51:10.00 10.0 undecidable manual PN 15 1.6872 1.2 0.4
--.LPL.Z. 1993-12-25T22:51:08.60 10.0 undecidable manual PN 323 1.6095 0.95 0.7
--.LPG.Z. 1993-12-25T22:51:08.30 10.0 undecidable manual PN 323 1.5762 0.95 0.7
--.BHB.Z. 1993-12-25T22:51:07.61 10.0 undecidable manual SG 315 0.8436 -1.4 0.1
--.LRG.Z. 1993-12-25T22:51:06.20 10.0 undecidable manual PN 239 1.4874 0.3 1.5
--.PZZ.Z. 1993-12-25T22:51:05.29 10.0 undecidable manual SG 290 0.7659 -1.15 0.4
--.ORO.Z. 1993-12-25T22:51:05.22 10.0 undecidable manual PN 356 1.3875 0.54 1.3
--.LMR.Z. 1993-12-25T22:51:04.80 10.0 undecidable manual PN 232 1.4652 -0.86 0.9
--.LSD.Z. 1993-12-25T22:51:04.50 10.0 undecidable manual PN 331 1.3875 -0.68 1.1
--.ORX.Z. 1993-12-25T22:51:03.43 10.0 undecidable manual PN 356 1.3875 -1.32 0.4
--.BNI.Z. 1993-12-25T22:51:03.58 10.0 undecidable manual PN 309 1.2987 0.1 1.7
--.DOI.Z. 1993-12-25T22:51:02.50 10.0 undecidable manual SG 293 0.6771 -0.86 0.4
--.FRF.Z. 1993-12-25T22:51:02.50 10.0 undecidable manual PN 238 1.2543 -0.23 1.7
--.RRL.Z. 1993-12-25T22:51:01.13 10.0 positive manual PN 306 1.1655 -0.44 3.1
--.SBF.Z. 1993-12-25T22:51:01.30 10.0 undecidable manual SG 233 0.6105 -0.02 0.8
--.STV.Z. 1993-12-25T22:50:59.40 10.0 undecidable manual SG 272 0.555 -0.28 0.7
--.RSP.Z. 1993-12-25T22:50:59.42 10.0 undecidable manual PG 326 1.0989 -1.21 0.5
--.ENR.Z. 1993-12-25T22:50:57.38 10.0 undecidable manual SG 269 0.4995 -0.1 0.7
--.BHB.Z. 1993-12-25T22:50:55.70 10.0 undecidable manual PG 315 0.8436 -0.33 1.7
--.PZZ.Z. 1993-12-25T22:50:54.26 10.0 negative manual PG 290 0.7659 -0.3 3.5
--.DOI.Z. 1993-12-25T22:50:52.65 10.0 undecidable manual PG 293 0.6771 -0.13 1.9
--.IMI.Z. 1993-12-25T22:50:51.84 10.0 undecidable manual SG 206 0.3552 -0.38 0.7
--.SBF.Z. 1993-12-25T22:50:51.70 10.0 undecidable manual PG 233 0.6105 0.11 1.9
--.PCP.Z. 1993-12-25T22:50:50.89 10.0 undecidable manual SG! 45 0.4329 -4.17 0
--.STV.Z. 1993-12-25T22:50:50.82 10.0 undecidable manual PG 272 0.555 0.17 1.8
--.ENR.Z. 1993-12-25T22:50:49.41 10.0 undecidable manual PG 269 0.4995 0.02 1.9
--.ROB.Z. 1993-12-25T22:50:47.50 10.0 undecidable manual SG 291 0.1776 1.98 0
--.IMI.Z. 1993-12-25T22:50:46.26 10.0 undecidable manual PG 206 0.3552 -0.09 1.9
--.PCP.Z. 1993-12-25T22:50:45.67 10.0 undecidable manual PG! 45 0.4329 -2.31 0
--.CKI.Z. 1993-12-25T22:50:45.28 10.0 undecidable manual SG 32 0.2109 -1.53 0.1
--.ROB.Z. 1993-12-25T22:50:43.88 10.0 undecidable manual PG 291 0.1776 1.41 0.3
--.CKI.Z. 1993-12-25T22:50:42.51 10.0 positive manual PG 32 0.2109 -0.71 2.4
--.FIN.Z. 1993-12-25T22:50:41.69 10.0 undecidable manual SG 111 0.0666 0.44 0.6
--.FIN.Z. 1993-12-25T22:50:40.30 10.0 undecidable manual PG 111 0.0666 0.29 1.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download