Earthquake with magnitude of Md 2.4 on date 10-01-1991 and time 23:54:46 (Italy) in region 3 km S Monteleone di Spoleto (PG)

A magnitude Md 2.4 earthquake occured in region: 3 km S Monteleone di Spoleto (PG), on

  • 10-01-1991 22:54:46 (UTC)
  • 10-01-1991 23:54:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.62, 12.96 at 5 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
Monteleone di Spoleto PG 3 599 599
Leonessa RI 7 2435 3034
Poggiodomo PG 10 117 3151
Polino TR 11 233 3384
Cascia PG 12 3217 6601
Ferentillo TR 14 1913 8514
Rivodutri RI 15 1253 9767
Poggio Bustone RI 15 2055 11822
Scheggino PG 15 461 12283
Morro Reatino RI 15 373 12656
Posta RI 16 694 13350
Sant'Anatolia di Narco PG 16 564 13914
Cittareale RI 16 482 14396
Montefranco TR 16 1276 15672
Arrone TR 16 2763 18435
Labro RI 17 374 18809
Cantalice RI 18 2755 21564
Vallo di Nera PG 18 364 21928
Borbona RI 19 617 22545

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Terni (111501 inhabitants)
43 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
61 Km W of Teramo (54892 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
72 Km N of Guidonia Montecelio (88673 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
75 Km N of Tivoli (56533 inhabitants)
90 Km NE of Roma (2864731 inhabitants)
98 Km W of Montesilvano (53738 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 2.4
ML-VAX 1.7
1991-01-10
22:54:46
42.62 12.96 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 133959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-01-10 22:54:46 ± 0.249
Latitude 42.62 ± 0.01
Longitude 12.96 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 133959

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) 2579.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.0136
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 133959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:04:53

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 133959
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
--.SDI.Z. 1991-01-10T22:55:25.20 10.0 undecidable manual SN 145 0.01 0.04 0.5
--.ARV.Z. 1991-01-10T22:55:17.92 10.0 undecidable manual SG 358 0.0079 -0.04 0.6
--.SFI.Z. 1991-01-10T22:55:16.00 10.0 undecidable manual PN 327 0.0136 1.36 0.1
--.CRE.Z. 1991-01-10T22:55:11.00 10.0 undecidable manual PN 323 0.0111 0.15 1.3
--.SDI.Z. 1991-01-10T22:55:09.00 10.0 undecidable manual PN 145 0.01 -0.02 1.4
--.ASS.Z. 1991-01-10T22:55:05.65 10.0 undecidable manual SG 332 0.0045 -0.1 0.6
--.ARV.Z. 1991-01-10T22:55:03.50 10.0 undecidable manual PG 358 0.0079 -1.37 0.2
--.MNS.Z. 1991-01-10T22:54:58.92 10.0 undecidable manual SG 221 0.0028 -0.38 0.4
--.ASS.Z. 1991-01-10T22:54:57.87 10.0 undecidable manual PG 332 0.0045 0.05 1.6
--.MNS.Z. 1991-01-10T22:54:54.13 10.0 positive manual PG 221 0.0028 0.03 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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