Earthquake with magnitude of Md 3.1 on date 12-09-1985 and time 21:19:32 (UTC) in region 2 km E Bolognola (MC)

A magnitude Md 3.1 earthquake occured in region: 2 km E Bolognola (MC), on

  • 12-09-1985 21:19:32 (UTC)
  • 12-09-1985 23:19:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.99, 13.25 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
Bolognola MC 2 142 142
Sarnano MC 7 3264 3406
Acquacanina MC 7 121 3527
Fiastra MC 9 559 4086
Amandola FM 9 3629 7715
Montefortino FM 9 1178 8893
Ussita MC 10 444 9337
Gualdo MC 11 815 10152
Montemonaco AP 12 604 10756
Castelsantangelo sul Nera MC 13 281 11037
Cessapalombo MC 13 512 11549
Fiordimonte MC 14 202 11751
Comunanza AP 14 3166 14917
Visso MC 14 1107 16024
San Ginesio MC 14 3498 19522
Pievebovigliana MC 15 866 20388
Camporotondo di Fiastrone MC 16 563 20951
Penna San Giovanni MC 16 1108 22059
Smerillo FM 16 365 22424
Monte San Martino MC 16 765 23189
Caldarola MC 17 1823 25012
Pieve Torina MC 17 1458 26470
Sant'Angelo in Pontano MC 17 1436 27906
Montefalcone Appennino FM 17 424 28330
Montegallo AP 18 523 28853
Muccia MC 19 915 29768
Belforte del Chienti MC 19 1886 31654
Ripe San Ginesio MC 20 852 32506
Monte Cavallo MC 20 145 32651

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
53 Km NW of Teramo (54892 inhabitants)
68 Km NE of Terni (111501 inhabitants)
71 Km E of Perugia (166134 inhabitants)
72 Km N of L'Aquila (69753 inhabitants)
73 Km SW of Ancona (100861 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
97 Km S of Fano (60888 inhabitants)
98 Km NW of Pescara (121014 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 1985-09-12
21:19:32
42.99 13.25 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 13049
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-09-12 21:19:32 ± 0.957
Latitude 42.99 ± 0.02
Longitude 13.25 ± 0.02
Depth (km) 10 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 13049

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) 2570.5
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 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.02914
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 13049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:16:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BD1.Z. 1985-09-12T21:20:36.50 10.0 undecidable manual SN 300 0.0198 1.3 0.2
--.BAD.Z. 1985-09-12T21:20:22.10 10.0 undecidable manual PN 359 0.0291 -0.94 0.5
--.BUA.Z. 1985-09-12T21:20:22.20 10.0 undecidable manual PN 358 0.029 -0.6 0.7
--.DRE.Z. 1985-09-12T21:20:21.20 10.0 undecidable manual PN 4 0.0287 -1.14 0.4
--.VOY.Z. 1985-09-12T21:20:20.00 10.0 undecidable manual PN 8 0.0276 -0.71 0.7
--.COL.Z. 1985-09-12T21:20:19.90 10.0 undecidable manual PN 1 0.0283 -1.74 0.1
--.BD1.Z. 1985-09-12T21:20:09.50 10.0 undecidable manual PN? 300 0.0198 0.82 0.3
--.DUI.Z. 1985-09-12T21:20:02.00 10.0 undecidable manual PN 145 0.0144 1.46 0.4
--.MNS.Z. 1985-09-12T21:19:58.00 10.0 undecidable manual SG 214 0.0066 0.06 0.9
--.SD1.Z. 1985-09-12T21:19:58.50 10.0 undecidable manual PN 161 0.0121 1.49 0.4
--.RDP.Z. 1985-09-12T21:19:57.30 10.0 undecidable manual PN 197 0.0116 1.05 0.8
--.AM1.Z. 1985-09-12T21:19:55.80 10.0 undecidable manual SG 24 0.0055 1.63 0.2
--.AS1.Z. 1985-09-12T21:19:48.00 10.0 undecidable manual SG 279 0.0039 -0.48 0.5
--.MNS.Z. 1985-09-12T21:19:46.50 10.0 negative manual PG 214 0.0066 -0.67 2.2
--.AM1.Z. 1985-09-12T21:19:44.90 10.0 negative manual PG 24 0.0055 -0.09 2.9
--.ALP.Z. 1985-09-12T21:19:44.30 10.0 undecidable manual SG 131 0.0028 -0.21 0.9
--.CM2.Z. 1985-09-12T21:19:42.80 10.0 undecidable manual SG 339 0.0019 1.51 0.2
--.AS1.Z. 1985-09-12T21:19:41.50 10.0 negative manual PG 279 0.0039 -0.2 2.9
--.ALP.Z. 1985-09-12T21:19:39.00 10.0 undecidable manual PG 131 0.0028 -0.41 2.6
--.CM2.Z. 1985-09-12T21:19:38.30 10.0 positive manual PG 339 0.0019 0.74 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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