Earthquake with magnitude of Md 2.5 on date 26-06-1991 and time 06:14:15 (Italy) in region 4 km W Monteleone di Spoleto (PG)

A magnitude Md 2.5 earthquake occured in region: 4 km W Monteleone di Spoleto (PG), on

  • 26-06-1991 04:14:15 (UTC)
  • 26-06-1991 06:14:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.65, 12.9 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 4 599 599
Poggiodomo PG 7 117 716
Polino TR 9 233 949
Scheggino PG 9 461 1410
Ferentillo TR 10 1913 3323
Sant'Anatolia di Narco PG 11 564 3887
Leonessa RI 11 2435 6322
Cascia PG 12 3217 9539
Montefranco TR 13 1276 10815
Arrone TR 13 2763 13578
Vallo di Nera PG 14 364 13942
Morro Reatino RI 15 373 14315
Rivodutri RI 16 1253 15568
Labro RI 16 374 15942
Spoleto PG 16 38218 54160
Poggio Bustone RI 17 2055 56215
Cerreto di Spoleto PG 19 1075 57290
Colli sul Velino RI 20 533 57823

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Terni (111501 inhabitants)
38 Km SE of Foligno (57155 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
70 Km E of Viterbo (67173 inhabitants)
74 Km N of Guidonia Montecelio (88673 inhabitants)
77 Km N of Tivoli (56533 inhabitants)
91 Km NE of Roma (2864731 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 2.5 1991-06-26
04:14:15
42.65 12.9 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 144139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-06-26 04:14:15 ± 0.145
Latitude 42.65 ± 0.01
Longitude 12.90 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 144139

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) 1455.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.01069
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 144139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:14:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1991-06-26T04:14:46.40 10.0 undecidable manual SG 1 0.0076 0.18 0.6
--.CRE.Z. 1991-06-26T04:14:40.00 10.0 undecidable manual PN 324 0.0107 1.03 0.2
--.AQU.Z. 1991-06-26T04:14:34.24 10.0 undecidable manual SG 128 0.0042 0.35 0.6
--.ASS.Z. 1991-06-26T04:14:33.10 10.0 undecidable manual SG 335 0.004 -0.07 0.8
--.ARV.Z. 1991-06-26T04:14:32.60 10.0 undecidable manual PG 1 0.0076 -0.55 0.8
--.MNS.Z. 1991-06-26T04:14:27.83 10.0 undecidable manual SG 211 0.0028 -0.14 0.7
--.AQU.Z. 1991-06-26T04:14:26.14 10.0 undecidable manual PG 128 0.0042 -0.11 1.9
--.ASS.Z. 1991-06-26T04:14:25.48 10.0 undecidable manual PG 335 0.004 -0.29 1.6
--.MNS.Z. 1991-06-26T04:14:22.65 10.0 undecidable manual PG 211 0.0028 -0.17 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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