Earthquake with magnitude of Md 3.1 on date 22-05-1994 and time 22:43:54 (Italy) in region 4 km E Norcia (PG)

A magnitude Md 3.1 earthquake occured in region: 4 km E Norcia (PG), on

  • 22-05-1994 20:43:54 (UTC)
  • 22-05-1994 22:43:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.14 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
Norcia PG 4 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 14 3217 10357
Accumoli RI 15 667 11024
Visso MC 15 1107 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Poggiodomo PG 19 117 14894
Sellano PG 20 1079 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km NW of Chieti (51815 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
Bulletin
Rev1000
Md 3.1
ML-VAX 2.5
1994-05-22
20:43:54
42.8 13.14 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 210069
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1994-05-22 20:43:54 ± 0.374
Latitude 42.80 ± 0.02
Longitude 13.14 ± 0.05
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 210069

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) 4693.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
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) 1.1
Epicentral distance of station closest to the epicenter (degree) 0.00389
Epicentral distance of station farthest from the epicenter (degree) 0.03068
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 210069
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:17:57

ML:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 10
Type of magnitude ML
Reference to an origin 210069
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
--.CTI.Z. 1994-05-22T20:44:48.63 10.0 undecidable manual PN 342 0.0307 0.2 0.8
--.GU9.Z. 1994-05-22T20:44:35.34 10.0 undecidable manual PN 310 0.0216 0.68 0.9
--.BDI.Z. 1994-05-22T20:44:33.99 10.0 undecidable manual PN 304 0.0201 1.74 0.4
--.RDP.Z. 1994-05-22T20:44:32.23 10.0 undecidable manual SN 196 0.0098 -0.26 0.6
--.PII.Z. 1994-05-22T20:44:31.84 10.0 undecidable manual PN 296 0.0189 1.25 0.7
--.FG2.Z. 1994-05-22T20:44:28.19 10.0 undecidable manual PN 122 0.0161 1.93 0.4
--.RFI.Z. 1994-05-22T20:44:26.70 10.0 undecidable manual PN! 156 0.0146 2.78 0
--.PGD.Z. 1994-05-22T20:44:23.80 10.0 undecidable manual PN 316 0.0134 1.8 0.5
--.SFI.Z. 1994-05-22T20:44:23.29 10.0 positive manual PN 319 0.013 1.84 1
--.ARV.Z. 1994-05-22T20:44:18.59 10.0 undecidable manual SG 348 0.0064 -1.84 0.2
--.RSM.Z. 1994-05-22T20:44:18.27 10.0 negative manual PN 335 0.011 -0.23 3
--.RMP.Z. 1994-05-22T20:44:17.90 10.0 undecidable manual PG 197 0.0093 1.38 0.9
--.RDP.Z. 1994-05-22T20:44:15.44 10.0 undecidable manual PN 196 0.0098 -1.1 1
--.MNS.Z. 1994-05-22T20:44:13.99 10.0 undecidable manual SG 218 0.0048 -0.84 0.5
--.AQU.Z. 1994-05-22T20:44:12.50 10.0 undecidable manual SG 156 0.0044 -0.79 0.5
--.ASS.Z. 1994-05-22T20:44:10.93 10.0 undecidable manual SG 306 0.0039 -0.84 0.5
--.ARV.Z. 1994-05-22T20:44:07.70 10.0 positive manual PG 348 0.0064 -1.88 1.1
--.MNS.Z. 1994-05-22T20:44:05.72 10.0 positive manual PG 218 0.0048 -0.63 2.7
--.AQU.Z. 1994-05-22T20:44:04.58 10.0 positive manual PG 156 0.0044 -0.88 2.4
--.ASS.Z. 1994-05-22T20:44:03.32 10.0 positive manual PG 306 0.0039 -1.25 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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