Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 07-08-1987 and time 11:37:04 (Italy) in region 6 km N Bedonia (PR)

A magnitude Md 2.5 earthquake occured in region: 6 km N Bedonia (PR), on

  • 07-08-1987 09:37:04 (UTC)
  • 07-08-1987 11:37:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5550, 9.6490 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
Bedonia PR 6 3482 3482
Compiano PR 7 1112 4594
Tornolo PR 8 1010 5604
Bardi PR 11 2227 7831
Borgo Val di Taro PR 12 6999 14830
Albareto PR 13 2156 16986
Santo Stefano d'Aveto GE 16 1126 18112
Ferriere PC 16 1294 19406
Farini PC 19 1290 20696
Valmozzola PR 19 539 21235
Morfasso PC 19 1024 22259
Varsi PR 20 1230 23489
Varese Ligure SP 20 2059 25548

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km N of La Spezia (93959 inhabitants)
56 Km S of Piacenza (102191 inhabitants)
59 Km E of Genova (586655 inhabitants)
60 Km W of Parma (192836 inhabitants)
64 Km NW of Carrara (63133 inhabitants)
70 Km NW of Massa (69479 inhabitants)
71 Km SW of Cremona (71901 inhabitants)
79 Km W of Reggio nell'Emilia (171345 inhabitants)
80 Km SE of Pavia (72576 inhabitants)
90 Km NW of Viareggio (62467 inhabitants)
91 Km E of Alessandria (93943 inhabitants)
97 Km E 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 2.5
M 3.0 		1987-08-07
09:37:04		 44.555 9.649 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 53499
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-07 09:37:04 ± 0.212
Latitude 44.5550 ± 0.0183
Longitude 9.6490 ± 0.0229
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 53499

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) 2726.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00130
Epicentral distance of station farthest from the epicenter (degree) 0.01538
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 53499
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:51:36

M:3.0

Field Value
Value 3.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 53499
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
--.STV.Z. 1987-08-07T09:37:57.50 10.0 undecidable manual SN 260 1.6761 0.77 0.4
--.ORX.Z. 1987-08-07T09:37:56.50 10.0 undecidable manual SN 313 1.5873 1.88 0
--.IMI.Z. 1987-08-07T09:37:49.30 10.0 undecidable manual SN 243 1.4097 -1 0.3
--.ROB.Z. 1987-08-07T09:37:47.20 10.0 undecidable manual SN 259 1.2876 -0.23 0.7
--.FIN.Z. 1987-08-07T09:37:47.20 10.0 undecidable manual SN! 251 1.0767 4.68 0
--.MDI.Z. 1987-08-07T09:37:45.50 10.0 undecidable manual SN 2 1.2099 -0.27 0.7
--.PS9.Z. 1987-08-07T09:37:40.66 10.0 undecidable manual SG 142 1.0434 -0.56 0.6
--.DOI.Z. 1987-08-07T09:37:36.58 10.0 undecidable manual PN 269 1.7094 1.36 0.4
--.STV.Z. 1987-08-07T09:37:35.40 10.0 undecidable manual PN 260 1.6761 0.59 1.2
--.ORX.Z. 1987-08-07T09:37:34.30 10.0 undecidable manual PN 313 1.5873 0.71 1.1
--.IMI.Z. 1987-08-07T09:37:30.20 10.0 undecidable manual PN 243 1.4097 -0.89 0.9
--.ROB.Z. 1987-08-07T09:37:29.20 10.0 undecidable manual PN 259 1.2876 -0.24 1.7
--.MDI.Z. 1987-08-07T09:37:28.50 10.0 undecidable manual PN 2 1.2099 -0.43 1.6
--.FIN.Z. 1987-08-07T09:37:26.00 10.0 undecidable manual PN 251 1.0767 -0.6 1.4
--.PS9.Z. 1987-08-07T09:37:25.76 10.0 undecidable manual PG 142 1.0434 -0.09 1.9
--.MME.Z. 1987-08-07T09:37:23.37 10.0 undecidable manual PG 115 0.8214 1.41 0.4
--.CO9.Z. 1987-08-07T09:37:13.92 10.0 undecidable manual SG 326 0.2553 -0.92 0.4
--.CO9.Z. 1987-08-07T09:37:09.77 10.0 undecidable manual PG 326 0.2553 -0.86 1.1
--.BVT.Z. 1987-08-07T09:37:07.80 10.0 undecidable manual PG 124 0.1443 -0.42 3.3
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