Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 03-02-1988 and time 11:40:51 (UTC) in region 6 km SE Santo Stefano d'Aveto (GE)

A magnitude Md 2.5 earthquake occured in region: 6 km SE Santo Stefano d'Aveto (GE), on

  • 03-02-1988 11:40:51 (UTC)
  • 03-02-1988 12:40:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.5150, 9.5080 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Santo Stefano d'Aveto GE 6 1126 1126
Rezzoaglio GE 10 995 2121
Bedonia PR 10 3482 5603
Tornolo PR 10 1010 6613
Compiano PR 13 1112 7725
Borzonasca GE 14 2049 9774
Ferriere PC 15 1294 11068
Fontanigorda GE 16 277 11345
Varese Ligure SP 17 2059 13404
Albareto PR 17 2156 15560
Mezzanego GE 18 1537 17097
Ottone PC 18 516 17613
Rovegno GE 19 554 18167
Gorreto GE 20 97 18264
Maissana SP 20 616 18880

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km E of Genova (586655 inhabitants)
52 Km NW of La Spezia (93959 inhabitants)
62 Km S of Piacenza (102191 inhabitants)
68 Km NW of Carrara (63133 inhabitants)
72 Km W of Parma (192836 inhabitants)
73 Km NW of Massa (69479 inhabitants)
80 Km SE of Pavia (72576 inhabitants)
80 Km SW of Cremona (71901 inhabitants)
83 Km SE of Alessandria (93943 inhabitants)
85 Km E of Savona (61345 inhabitants)
91 Km W of Reggio nell'Emilia (171345 inhabitants)
93 Km NW of Viareggio (62467 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 2.5
M 2.9 		1988-02-03
11:40:51		 44.515 9.508 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 62329
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-02-03 11:40:51 ± 0.144
Latitude 44.5150 ± 0.0105
Longitude 9.5080 ± 0.0143
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 62329

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) 1632.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.03764
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 62329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:59:15

M:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 62329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:42:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.LMR.Z. 1988-02-03T11:42:01.00 10.0 undecidable manual SN 242 2.4531 -1.26 0
--.CDF.Z. 1988-02-03T11:41:56.80 10.0 undecidable manual PN 339 4.1736 0.57 0.6
--.CTI.Z. 1988-02-03T11:41:54.00 10.0 undecidable manual SN 43 2.1423 -0.84 0.2
--.SBF.Z. 1988-02-03T11:41:42.20 10.0 undecidable manual SN 246 1.6206 -0.13 0.7
--.ORO.Z. 1988-02-03T11:41:39.70 10.0 undecidable manual SN 316 1.5429 -0.88 0.2
--.MDI.Z. 1988-02-03T11:41:34.58 10.0 undecidable manual SN 6 1.2654 0.63 0.4
--.LMR.Z. 1988-02-03T11:41:32.80 10.0 undecidable manual PN 242 2.4531 0.27 1.3
--.CTI.Z. 1988-02-03T11:41:27.56 10.0 undecidable manual PN 43 2.1423 -0.69 0.7
--.CVF.Z. 1988-02-03T11:41:25.30 10.0 undecidable manual PN 193 1.998 -0.92 0.4
--.SS9.Z. 1988-02-03T11:41:23.62 10.0 undecidable manual PN 108 1.7649 0.42 1.3
--.CKI.Z. 1988-02-03T11:41:23.40 10.0 undecidable manual SG 264 0.8769 0.29 0.7
--.SBF.Z. 1988-02-03T11:41:21.40 10.0 undecidable manual PN 246 1.6206 0.38 1.5
--.ORO.Z. 1988-02-03T11:41:20.24 10.0 undecidable manual PN 316 1.5429 0.23 1.7
--.VAI.Z. 1988-02-03T11:41:19.47 10.0 undecidable manual PN 339 1.443 0.84 0.6
--.MDI.Z. 1988-02-03T11:41:16.42 10.0 undecidable manual PN 6 1.2654 0.24 1.7
--.MME.Z. 1988-02-03T11:41:10.92 10.0 undecidable manual PG 110 0.9102 0.48 1.3
--.BDI.Z. 1988-02-03T11:41:10.16 10.0 undecidable manual PG 119 0.8991 -0.11 1.8
--.CKI.Z. 1988-02-03T11:41:10.15 10.0 undecidable manual PG 264 0.8769 0.22 1.7
--.BOB.Z. 1988-02-03T11:41:02.16 10.0 undecidable manual SG 350 0.2553 0.25 0.7
--.BOB.Z. 1988-02-03T11:40:57.12 10.0 positive manual PG 350 0.2553 -0.57 2.2
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