Earthquake with magnitude of Md 3.1 on date 07-04-1985 and time 03:11:25 (Italy) in region 3 km SE Stroncone (TR)

A magnitude Md 3.1 earthquake occured in region: 3 km SE Stroncone (TR), on

  • 07-04-1985 01:11:25 (UTC)
  • 07-04-1985 03:11:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.48, 12.68 at 6 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
Stroncone TR 3 4917 4917
Configni RI 7 633 5550
Greccio RI 8 1558 7108
Colli sul Velino RI 8 533 7641
Cottanello RI 8 563 8204
Terni TR 10 111501 119705
Contigliano RI 10 3783 123488
Montasola RI 11 395 123883
Labro RI 11 374 124257
Vacone RI 11 256 124513
Calvi dell'Umbria TR 13 1856 126369
Morro Reatino RI 13 373 126742
Arrone TR 14 2763 129505
Narni TR 14 19785 149290
Montebuono RI 15 883 150173
Torri in Sabina RI 15 1256 151429
Rivodutri RI 15 1253 152682
Montefranco TR 15 1276 153958
Tarano RI 16 1444 155402
Casperia RI 16 1246 156648
Poggio Bustone RI 17 2055 158703
Rieti RI 17 47698 206401
Polino TR 18 233 206634
Roccantica RI 18 563 207197
Ferentillo TR 18 1913 209110
Otricoli TR 18 1869 210979
Cantalice RI 18 2755 213734
Selci RI 19 1106 214840
San Gemini TR 19 5018 219858
Monte San Giovanni in Sabina RI 19 714 220572
Collevecchio RI 19 1577 222149
Cantalupo in Sabina RI 19 1685 223834

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SE of Terni (111501 inhabitants)
48 Km E of Viterbo (67173 inhabitants)
53 Km S of Foligno (57155 inhabitants)
54 Km N of Guidonia Montecelio (88673 inhabitants)
58 Km N of Tivoli (56533 inhabitants)
60 Km W of L'Aquila (69753 inhabitants)
67 Km N of Roma (2864731 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
85 Km NE of Civitavecchia (52991 inhabitants)
86 Km W of Teramo (54892 inhabitants)
87 Km NE of Fiumicino (78395 inhabitants)
89 Km N of Velletri (53303 inhabitants)
91 Km N of Pomezia (62966 inhabitants)
99 Km N of Aprilia (73446 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 1985-04-07
01:11:25
42.48 12.68 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 4189
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-07 01:11:25 ± 0.226
Latitude 42.48 ± 0.01
Longitude 12.68 ± 0.02
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4189

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) 1938.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.0327
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 4189
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1985-04-07T01:13:05.00 10.0 undecidable manual SN 348 0.0327 1.12 0.1
--.CTI.Z. 1985-04-07T01:12:23.00 10.0 undecidable manual PN 348 0.0327 0.65 0.4
--.SD1.Z. 1985-04-07T01:12:05.00 10.0 undecidable manual SN 132 0.0102 0.64 0.4
--.AR1.Z. 1985-04-07T01:12:01.50 10.0 undecidable manual SG 10 0.0092 -0.09 0.8
--.RMP.N. 1985-04-07T01:11:52.00 10.0 undecidable manual SG? 178 0.006 2.11 0
--.RDP.Z. 1985-04-07T01:11:51.50 10.0 undecidable manual SG 178 0.0065 -0.09 0.8
--.PRG.Z. 1985-04-07T01:11:49.00 10.0 undecidable manual SG 341 0.0058 -0.41 0.7
--.CH1.Z. 1985-04-07T01:11:49.00 10.0 undecidable manual PN 335 0.0113 -0.75 0.8
--.SD1.Z. 1985-04-07T01:11:48.50 10.0 undecidable manual PN 132 0.0102 0.52 1
--.AS1.Z. 1985-04-07T01:11:47.00 10.0 undecidable manual SG 357 0.0052 -0.06 0.8
--.AQU.Z. 1985-04-07T01:11:46.50 10.0 undecidable manual SG 103 0.0049 0.62 0.4
--.AR1.Z. 1985-04-07T01:11:45.50 10.0 undecidable manual PG 10 0.0092 -0.88 0.7
--.PRG.Z. 1985-04-07T01:11:41.00 10.0 undecidable manual PG 341 0.0058 1.65 0.4
--.RMP.Z. 1985-04-07T01:11:40.00 10.0 positive manual PG 178 0.006 0.37 2.5
--.ALP.Z. 1985-04-07T01:11:40.00 10.0 undecidable manual PG 64 0.0064 -0.47 2.4
--.RDP.Z. 1985-04-07T01:11:39.50 10.0 positive manual PG 178 0.0065 -1.11 1.1
--.AQU.Z. 1985-04-07T01:11:38.00 10.0 undecidable manual PG 103 0.0049 0.69 1
--.AS1.Z. 1985-04-07T01:11:37.00 10.0 undecidable manual PG 357 0.0052 -0.99 1.2
--.PO9.Z. 1985-04-07T01:11:33.80 10.0 undecidable manual SG 63 0.0019 -0.18 0.6
--.MNS.Z. 1985-04-07T01:11:30.20 10.0 undecidable manual SG 181 0.0008 0.42 0.7
--.PO9.Z. 1985-04-07T01:11:30.80 10.0 undecidable manual PG 63 0.0019 0.36 1.3
--.MNS.Z. 1985-04-07T01:11:28.00 10.0 positive manual PG 181 0.0008 -0.02 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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