Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 24-12-1993 and time 14:33:21 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude Md 2.4 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 24-12-1993 13:33:21 (UTC)
  • 24-12-1993 14:33:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7370, 7.8480 at 11 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
Sanremo IM 11 54807 54807
Riva Ligure IM 12 2910 57717
Santo Stefano al Mare IM 12 2197 59914
Taggia IM 12 14116 74030
Ospedaletti IM 13 3367 77397
Pompeiana IM 13 823 78220
Terzorio IM 14 216 78436
Castellaro IM 14 1256 79692
Cipressa IM 15 1290 80982
Bordighera IM 15 10469 91451
Costarainera IM 15 828 92279
Seborga IM 16 315 92594
San Lorenzo al Mare IM 16 1297 93891
Vallebona IM 17 1310 95201
Ceriana IM 17 1250 96451
Vallecrosia IM 18 6956 103407
Pietrabruna IM 18 501 103908
Civezza IM 18 609 104517
San Biagio della Cima IM 18 1329 105846
Soldano IM 19 977 106823
Camporosso IM 20 5632 112455
Badalucco IM 20 1136 113591

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SE of Sanremo (54807 inhabitants)
77 Km SE of Cuneo (56081 inhabitants)
81 Km SW of Savona (61345 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 2.4
M 2.6 		1993-12-24
13:33:21		 43.737 7.848 11 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 202529
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-12-24 13:33:21 ± 0.372
Latitude 43.7370 ± 0.0197
Longitude 7.8480 ± 0.0153
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 202529

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) 2514.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 261
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.01748
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 202529
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:10:27

M:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 202529
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
--.BHB.Z. 1993-12-24T13:33:58.97 10.0 undecidable manual SN 339 1.1655 -0.46 0.2
--.LPL.Z. 1993-12-24T13:33:57.40 10.0 undecidable manual PN! 336 1.9425 3.49 0
--.PCP.Z. 1993-12-24T13:33:52.62 10.0 undecidable manual SG 31 0.9435 -0.9 0.1
--.DOI.Z. 1993-12-24T13:33:52.00 10.0 undecidable manual SG 330 0.8769 0.63 0.3
--.PZZ.Z. 1993-12-24T13:33:52.29 10.0 undecidable manual SG 325 0.9324 -0.85 0.1
--.RRL.Z. 1993-12-24T13:33:47.58 10.0 undecidable manual PN 327 1.3986 1.1 0.1
--.RSP.Z. 1993-12-24T13:33:47.58 10.0 undecidable manual PN 343 1.4763 0.15 1.4
--.STV.Z. 1993-12-24T13:33:43.22 10.0 undecidable manual SG 324 0.6327 -0.27 0.6
--.BHB.Z. 1993-12-24T13:33:43.22 10.0 undecidable manual PN 339 1.1655 -0.07 1.5
--.ENR.Z. 1993-12-24T13:33:41.85 10.0 undecidable manual SG 328 0.5772 0.17 0.7
--.ROB.Z. 1993-12-24T13:33:41.53 10.0 undecidable manual SG 1 0.555 0.27 0.7
--.FIN.Z. 1993-12-24T13:33:40.39 10.0 undecidable manual SG 28 0.5328 -0.01 0.8
--.PZZ.Z. 1993-12-24T13:33:39.34 10.0 undecidable manual PG 325 0.9324 -0.31 1.4
--.PCP.Z. 1993-12-24T13:33:39.59 10.0 undecidable manual PG 31 0.9435 -0.28 1.5
--.DOI.Z. 1993-12-24T13:33:39.00 10.0 undecidable manual PG 330 0.8769 0.37 1.4
--.STV.Z. 1993-12-24T13:33:34.20 10.0 undecidable manual PG 324 0.6327 -0.06 2
--.ENR.Z. 1993-12-24T13:33:33.20 10.0 undecidable manual PG 328 0.5772 -0.02 2
--.ROB.Z. 1993-12-24T13:33:32.79 10.0 undecidable manual PG 1 0.555 0 2
--.SBF.Z. 1993-12-24T13:33:32.90 10.0 undecidable manual SG 293 0.3108 -0.61 0.3
--.FIN.Z. 1993-12-24T13:33:32.15 10.0 undecidable manual PG 28 0.5328 -0.15 1.8
--.IMI.Z. 1993-12-24T13:33:29.95 10.0 undecidable manual SG 10 0.1665 1.13 0
--.SBF.Z. 1993-12-24T13:33:28.40 10.0 undecidable manual PG 293 0.3108 0.08 2
--.IMI.Z. 1993-12-24T13:33:25.92 10.0 undecidable manual PG 10 0.1665 0.31 1.6
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