Earthquake with magnitude of Md 3.5 on date 25-11-1985 and time 11:28:57 (UTC) in region 5 km S Valfabbrica (PG)

A magnitude Md 3.5 earthquake occured in region: 5 km S Valfabbrica (PG), on

  • 25-11-1985 11:28:57 (UTC)
  • 25-11-1985 12:28:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.12, 12.62 at 10 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
Valfabbrica PG 5 3389 3389
Assisi PG 5 28299 31688
Bastia Umbra PG 8 21874 53562
Valtopina PG 13 1398 54960
Cannara PG 14 4305 59265
Nocera Umbra PG 14 5839 65104
Spello PG 14 8645 73749
Bettona PG 16 4367 78116
Torgiano PG 18 6725 84841
Perugia PG 19 166134 250975
Gualdo Tadino PG 19 15208 266183
Foligno PG 19 57155 323338

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Perugia (166134 inhabitants)
19 Km NW of Foligno (57155 inhabitants)
62 Km N of Terni (111501 inhabitants)
71 Km SE of Arezzo (99543 inhabitants)
87 Km SW of Fano (60888 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
92 Km S of Pesaro (94582 inhabitants)
92 Km SW of Ancona (100861 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 3.5
ML-VAX 3.5
1985-11-25
11:28:57
43.12 12.62 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 16779
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-11-25 11:28:57 ± 0.167
Latitude 43.12 ± 0.01
Longitude 12.62 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 16779

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) 2225.5
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 49
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.06686
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 37
Magnitudes information

Md:3.5

Field Value
Value 3.5
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 16779
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:19:38

ML:3.5

Field Value
Value 3.5
Uncertainty
Num. used stations 9
Type of magnitude ML
Reference to an origin 16779
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LOR.Z. 1985-11-25T11:32:05.20 10.0 undecidable manual SN 307 0.0669 0.84 0.3
--.LBF.Z. 1985-11-25T11:31:59.20 10.0 undecidable manual SN 305 0.0649 -0.11 0.4
--.HAU.Z. 1985-11-25T11:31:44.40 10.0 undecidable manual SN 320 0.0591 0.64 0.4
--.CDF.Z. 1985-11-25T11:31:42.00 10.0 undecidable manual SN 326 0.0582 0.49 0.4
--.BSF.Z. 1985-11-25T11:31:36.40 10.0 undecidable manual SN 321 0.0561 0.52 0.4
--.FRF.Z. 1985-11-25T11:30:51.80 10.0 undecidable manual SN 277 0.0392 0.43 0.5
--.LOR.Z. 1985-11-25T11:30:45.20 10.0 undecidable manual PN 307 0.0669 -0.05 1
--.SMF.Z. 1985-11-25T11:30:41.60 10.0 undecidable manual PN 302 0.0643 0.31 1
--.LBF.Z. 1985-11-25T11:30:41.80 10.0 undecidable manual PN 305 0.0649 -0.54 0.9
--.HAU.Z. 1985-11-25T11:30:33.60 10.0 undecidable manual PN 320 0.0591 0.24 1.1
--.CDF.Z. 1985-11-25T11:30:32.00 10.0 undecidable manual PN 326 0.0582 -0.06 1.1
--.OHR.Z. 1985-11-25T11:30:30.00 10.0 undecidable manual PN 105 0.0575 -0.89 0.8
--.BSF.Z. 1985-11-25T11:30:28.40 10.0 undecidable manual PN 321 0.0561 -0.41 1.1
--.BN9.Z. 1985-11-25T11:30:09.00 10.0 undecidable manual PN 296 0.0421 1.5 0.5
--.LRG.Z. 1985-11-25T11:30:06.80 10.0 undecidable manual PN 276 0.041 0.92 1
--.LMR.Z. 1985-11-25T11:30:03.70 10.0 undecidable manual PN 274 0.0401 -0.66 1.2
--.FRF.Z. 1985-11-25T11:30:03.00 10.0 undecidable manual PN 277 0.0392 -0.11 1.4
--.DA9.Z. 1985-11-25T11:30:01.00 10.0 undecidable manual PN 291 0.037 1.29 0.7
--.VAI.Z. 1985-11-25T11:29:56.50 10.0 undecidable manual PN 316 0.0349 -0.03 1.5
--.ROB.Z. 1985-11-25T11:29:53.40 10.0 undecidable manual PN 290 0.0326 0.39 1.5
--.FO1.Z. 1985-11-25T11:29:52.00 10.0 undecidable manual PN 1 0.0312 1.04 1
--.RBL.Z. 1985-11-25T11:29:51.00 10.0 undecidable manual PN 11 0.0304 1.23 0.8
--.CKI.Z. 1985-11-25T11:29:50.00 10.0 undecidable manual PN 294 0.0305 0.21 1.6
--.MDI.Z. 1985-11-25T11:29:50.00 10.0 undecidable manual PN 323 0.0303 0.48 1.5
--.FIN.Z. 1985-11-25T11:29:48.90 10.0 undecidable manual PN 290 0.0303 -0.58 1.4
--.PS9.Z. 1985-11-25T11:29:47.50 10.0 undecidable manual SN 292 0.0147 0.95 0.7
--.CTI.Z. 1985-11-25T11:29:46.00 10.0 undecidable manual PN 347 0.027 1.46 0.7
--.CO9.Z. 1985-11-25T11:29:44.00 10.0 undecidable manual PN 307 0.0253 2.13 0.2
--.SAL.Z. 1985-11-25T11:29:43.00 10.0 undecidable manual PN 329 0.0261 -0.09 1.6
--.TRI.Z. 1985-11-25T11:29:40.90 10.0 undecidable manual PN 17 0.0244 0.37 1.5
--.BVT.Z. 1985-11-25T11:29:37.40 10.0 undecidable manual PN 304 0.0219 0.75 1.3
--.FIR.N. 1985-11-25T11:29:36.00 10.0 undecidable manual SN 304 0.0106 0.11 0.7
--.DUI.Z. 1985-11-25T11:29:31.00 10.0 undecidable manual PN 136 0.0179 0.42 1.5
--.AQU.Z. 1985-11-25T11:29:31.00 10.0 undecidable manual SG 142 0.0086 1.24 0.5
--.SD1.Z. 1985-11-25T11:29:29.00 10.0 undecidable manual PN 147 0.0149 2.99 0
--.BDI.Z. 1985-11-25T11:29:26.00 10.0 undecidable manual PN 303 0.0156 -1.14 0.9
--.PS9.Z. 1985-11-25T11:29:25.00 10.0 undecidable manual PN 292 0.0147 -0.68 1.3
--.MNS.Z. 1985-11-25T11:29:23.00 10.0 undecidable manual SG 176 0.0066 0.38 0.9
--.MAO.Z. 1985-11-25T11:29:22.50 10.0 undecidable manual PN 237 0.0115 1.67 0.5
--.RDP.Z. 1985-11-25T11:29:22.70 10.0 undecidable manual PN 176 0.0122 0.8 1.2
--.FIR.Z. 1985-11-25T11:29:19.00 10.0 undecidable manual PN 304 0.0106 -0.53 1.4
--.AQU.Z. 1985-11-25T11:29:15.00 10.0 positive manual PG 142 0.0086 -0.99 2.1
--.ARV.Z. 1985-11-25T11:29:13.00 10.0 undecidable manual SG 31 0.004 -0.53 0.9
--.MNS.Z. 1985-11-25T11:29:11.20 10.0 negative manual PG 176 0.0066 -0.67 2.7
--.CRE.Z. 1985-11-25T11:29:09.80 10.0 negative manual PG 316 0.0062 -1.42 1.4
--.ARV.Z. 1985-11-25T11:29:05.00 10.0 positive manual PG 31 0.004 -1.62 1
--.PRG.Z. 1985-11-25T11:29:03.00 10.0 undecidable manual SG 264 0.0014 -1.29 0.5
--.PRG.Z. 1985-11-25T11:28:59.50 10.0 undecidable manual PG 264 0.0014 -1.78 0.8
--.ASS.Z. 1985-11-25T11:28:58.50 10.0 undecidable manual PG 154 0.0005 -1.08 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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