Earthquake with magnitude of Md 2.3 on date 04-02-1986 and time 19:09:39 (Italy) in region 2 km W Sarnano (MC)

A magnitude Md 2.3 earthquake occured in region: 2 km W Sarnano (MC), on

  • 04-02-1986 18:09:39 (UTC)
  • 04-02-1986 19:09:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.03, 13.28 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
Sarnano MC 2 3264 3264
Bolognola MC 6 142 3406
Gualdo MC 6 815 4221
Amandola FM 8 3629 7850
Acquacanina MC 9 121 7971
Cessapalombo MC 9 512 8483
San Ginesio MC 9 3498 11981
Fiastra MC 10 559 12540
Montefortino FM 11 1178 13718
Camporotondo di Fiastrone MC 12 563 14281
Penna San Giovanni MC 12 1108 15389
Sant'Angelo in Pontano MC 12 1436 16825
Caldarola MC 13 1823 18648
Monte San Martino MC 13 765 19413
Comunanza AP 14 3166 22579
Smerillo FM 14 365 22944
Ripe San Ginesio MC 15 852 23796
Ussita MC 15 444 24240
Montemonaco AP 15 604 24844
Montefalcone Appennino FM 15 424 25268
Belforte del Chienti MC 15 1886 27154
Fiordimonte MC 15 202 27356
Pievebovigliana MC 16 866 28222
Colmurano MC 16 1263 29485
Santa Vittoria in Matenano FM 18 1330 30815
Serrapetrona MC 18 966 31781
Falerone FM 18 3337 35118
Castelsantangelo sul Nera MC 18 281 35399
Servigliano FM 18 2336 37735
Pieve Torina MC 19 1458 39193
Force AP 19 1354 40547
Loro Piceno MC 19 2401 42948
Visso MC 19 1107 44055
Montappone FM 20 1682 45737
Monte Vidon Corrado FM 20 731 46468
Tolentino MC 20 20069 66537

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km E of Foligno (57155 inhabitants)
54 Km NW of Teramo (54892 inhabitants)
68 Km S of Ancona (100861 inhabitants)
73 Km E of Perugia (166134 inhabitants)
73 Km NE of Terni (111501 inhabitants)
76 Km N of L'Aquila (69753 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
93 Km S of Fano (60888 inhabitants)
99 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 2.3 1986-02-04
18:09:39
43.03 13.28 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 22049
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-04 18:09:39 ± 0.364
Latitude 43.03 ± 0.01
Longitude 13.28 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 22049

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) 2919.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 241
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00413
Epicentral distance of station farthest from the epicenter (degree) 0.00696
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 22049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:24:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1986-02-04T18:10:07.50 10.0 undecidable manual SG 214 0.007 0.61 0.1
--.ARV.Z. 1986-02-04T18:09:59.50 10.0 undecidable manual SG 332 0.0047 0.67 0.1
--.ASS.Z. 1986-02-04T18:09:56.50 10.0 undecidable manual SG 273 0.0041 -0.1 0.6
--.MNS.Z. 1986-02-04T18:09:55.50 10.0 undecidable manual PG 214 0.007 0 1.4
--.ARV.Z. 1986-02-04T18:09:50.70 10.0 positive manual PG 332 0.0047 -0.14 2.9
--.ASS.Z. 1986-02-04T18:09:49.20 10.0 undecidable manual PG 273 0.0041 -0.36 0.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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