Earthquake with magnitude of Md 2.2 on date 12-02-1985 and time 11:07:03 (UTC) in region 4 km W Cerreto di Spoleto (PG)

A magnitude Md 2.2 earthquake occured in region: 4 km W Cerreto di Spoleto (PG), on

  • 12-02-1985 11:07:03 (UTC)
  • 12-02-1985 12:07:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.81, 12.87 at 0 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
Cerreto di Spoleto PG 4 1075 1075
Vallo di Nera PG 5 364 1439
Campello sul Clitunno PG 8 2442 3881
Sant'Anatolia di Narco PG 9 564 4445
Sellano PG 10 1079 5524
Scheggino PG 12 461 5985
Poggiodomo PG 12 117 6102
Trevi PG 13 8469 14571
Spoleto PG 14 38218 52789
Preci PG 15 724 53513
Cascia PG 16 3217 56730
Castel Ritaldi PG 16 3278 60008
Norcia PG 18 4957 64965
Monteleone di Spoleto PG 19 599 65564

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SE of Foligno (57155 inhabitants)
34 Km NE of Terni (111501 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
70 Km W of Teramo (54892 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
91 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 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 2.2
M 2.4
1985-02-12
11:07:03
42.81 12.87 0 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1549
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-12 11:07:03 ± 0.629
Latitude 42.81 ± 0.01
Longitude 12.87 ± 0.02
Depth (km) 0 ± 91 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1549

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) 2106.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.00405
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 1549
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:38

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1549
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-12T11:07:20.20 10.0 undecidable manual SG 27 0.0038 0.14 1
--.MNS.Z. 1985-02-12T11:07:20.00 10.0 undecidable manual SG 198 0.004 -0.92 0
--.MNS.Z. 1985-02-12T11:07:14.00 10.0 undecidable manual PG 198 0.004 0.43 0.9
--.PO9.Z. 1985-02-12T11:07:12.50 10.0 undecidable manual SG 168 0.0022 -0.44 0.4
--.CM8.Z. 1985-02-12T11:07:12.70 10.0 undecidable manual PG 27 0.0038 -0.37 1
--.AS1.Z. 1985-02-12T11:07:10.00 10.0 undecidable manual PG 327 0.0026 -0.13 1.8
--.PO9.Z. 1985-02-12T11:07:09.00 10.0 undecidable manual PG 168 0.0022 0.04 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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