Earthquake with magnitude of Md 3.1 on date 04-02-1985 and time 01:34:36 (Italy) in region 4 km W Cerreto di Spoleto (PG)

A magnitude Md 3.1 earthquake occured in region: 4 km W Cerreto di Spoleto (PG), on

  • 04-02-1985 00:34:36 (UTC)
  • 04-02-1985 01:34:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.82, 12.87 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cerreto di Spoleto PG 4 1075 1075
Vallo di Nera PG 5 364 1439
Campello sul Clitunno PG 8 2442 3881
Sellano PG 9 1079 4960
Sant'Anatolia di Narco PG 10 564 5524
Scheggino PG 12 461 5985
Trevi PG 12 8469 14454
Poggiodomo PG 13 117 14571
Spoleto PG 14 38218 52789
Preci PG 15 724 53513
Cascia PG 16 3217 56730
Castel Ritaldi PG 16 3278 60008
Norcia PG 18 4957 64965
Monteleone di Spoleto PG 20 599 65564
Montefalco PG 20 5679 71243

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SE of Foligno (57155 inhabitants)
34 Km NE of Terni (111501 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
70 Km W of Teramo (54892 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
92 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 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
Rev 1000 Md 3.1 1985-02-04
00:34:36
42.82 12.87 3 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1029
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-04 00:34:36 ± 0.237
Latitude 42.82 ± 0.01
Longitude 12.87 ± 0.02
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 1029

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) 2083.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
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) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.03392
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 1029
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.VOY.Z. 1985-02-04T00:36:07.80 10.0 undecidable manual SN 12 0.0296 0.24 0.5
--.ZOU.Z. 1985-02-04T00:35:36.00 10.0 undecidable manual PN 1 0.0336 0.7 0.7
--.FO1.Z. 1985-02-04T00:35:35.50 10.0 undecidable manual PN 359 0.0339 -0.3 1
--.CK1.Z. 1985-02-04T00:35:34.00 10.0 undecidable manual PN 297 0.0332 -0.63 0.8
--.RBL.Z. 1985-02-04T00:35:33.50 10.0 undecidable manual PN 7 0.0329 -0.66 0.8
--.BOO.Z. 1985-02-04T00:35:32.70 10.0 undecidable manual PN 2 0.0315 0.61 0.9
--.MPR.Z. 1985-02-04T00:35:32.00 10.0 undecidable manual PN 1 0.0308 1.02 0.5
--.BAD.Z. 1985-02-04T00:35:31.20 10.0 undecidable manual PN 4 0.0308 0.16 1.2
--.LJU.Z. 1985-02-04T00:35:31.80 10.0 undecidable manual PN 19 0.0308 0.67 0.8
--.BUA.Z. 1985-02-04T00:35:31.30 10.0 undecidable manual PN 2 0.0306 0.59 0.9
--.RCL.Z. 1985-02-04T00:35:30.60 10.0 undecidable manual PN 357 0.03 0.71 0.8
--.VOY.Z. 1985-02-04T00:35:30.00 10.0 undecidable manual PN 12 0.0296 0.8 0.7
--.DRE.Z. 1985-02-04T00:35:30.50 10.0 undecidable manual PN 9 0.0305 -0.14 1.2
--.CTI.Z. 1985-02-04T00:35:28.00 10.0 undecidable manual PN 345 0.03 -1.89 0
--.TRI.Z. 1985-02-04T00:35:25.00 10.0 undecidable manual PN 12 0.0266 0.39 1.2
--.RDP.Z. 1985-02-04T00:35:14.00 10.0 undecidable manual SG 186 0.0096 -0.3 0.6
--.CH1.Z. 1985-02-04T00:35:14.00 10.0 undecidable manual SG 320 0.0095 0.11 0.7
--.RMP.N. 1985-02-04T00:35:13.00 10.0 undecidable manual SG 187 0.0091 0.34 0.6
--.PS9.Z. 1985-02-04T00:35:09.50 10.0 undecidable manual PN 298 0.0173 -1.03 0.6
--.DUI.Z. 1985-02-04T00:35:07.00 10.0 undecidable manual PN 134 0.0148 0.37 1.5
--.MA1.Z. 1985-02-04T00:35:02.50 10.0 undecidable manual PN 253 0.0119 0.3 1.5
--.AR1.Z. 1985-02-04T00:35:00.50 10.0 undecidable manual SG 4 0.0061 -1.49 0.1
--.CH1.Z. 1985-02-04T00:34:59.00 10.0 undecidable manual PG 320 0.0095 0.78 1
--.RDP.Z. 1985-02-04T00:34:58.00 10.0 undecidable manual PG 186 0.0096 -0.45 1.4
--.RMP.Z. 1985-02-04T00:34:57.00 10.0 undecidable manual PG 187 0.0091 -0.5 1.3
--.MNS.Z. 1985-02-04T00:34:53.50 10.0 undecidable manual SG 198 0.004 -0.87 0.5
--.PRG.Z. 1985-02-04T00:34:53.00 10.0 undecidable manual SG 309 0.004 -1.1 0.3
--.CM8.Z. 1985-02-04T00:34:52.00 10.0 undecidable manual SG 27 0.0038 -1.22 0.2
--.AR1.Z. 1985-02-04T00:34:50.50 10.0 undecidable manual PG 4 0.0061 -0.85 0.9
--.AS1.Z. 1985-02-04T00:34:49.00 10.0 undecidable manual SG 326 0.0026 0.89 0.5
--.PRG.Z. 1985-02-04T00:34:47.00 10.0 undecidable manual PG 309 0.004 0.21 3.2
--.MNS.Z. 1985-02-04T00:34:46.70 10.0 positive manual PG 198 0.004 -0.25 3.2
--.CM8.Z. 1985-02-04T00:34:45.00 10.0 undecidable manual PG 27 0.0038 -1.28 0.4
--.AS1.Z. 1985-02-04T00:34:44.00 10.0 undecidable manual PG 326 0.0026 0.67 2.2
--.PO9.Z. 1985-02-04T00:34:43.00 10.0 positive manual PG 168 0.0022 0.63 2.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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