Earthquake with magnitude of Md 3.3 on date 15-05-1997 and time 06:42:23 (Italy) in region 3 km S Giano dell'Umbria (PG)

A magnitude Md 3.3 earthquake occured in region: 3 km S Giano dell'Umbria (PG), on

  • 15-05-1997 04:42:23 (UTC)
  • 15-05-1997 06:42:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.81, 12.59 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
Giano dell'Umbria PG 3 3846 3846
Massa Martana PG 6 3770 7616
Castel Ritaldi PG 7 3278 10894
Montefalco PG 11 5679 16573
Gualdo Cattaneo PG 12 6155 22728
Acquasparta TR 13 4778 27506
Bevagna PG 14 5081 32587
Spoleto PG 15 38218 70805
Todi PG 15 16851 87656
Trevi PG 15 8469 96125
Campello sul Clitunno PG 16 2442 98567
Collazzone PG 16 3473 102040
Fratta Todina PG 19 1839 103879
Montecastrilli TR 19 5022 108901
Foligno PG 19 57155 166056
Monte Castello di Vibio PG 20 1567 167623

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km SW of Foligno (57155 inhabitants)
28 Km N of Terni (111501 inhabitants)
37 Km SE of Perugia (166134 inhabitants)
59 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
90 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km W of Teramo (54892 inhabitants)
93 Km SE of Arezzo (99543 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
Bulletin
Rev1000
Md 3.3
ML-VAX 1.8
1997-05-15
04:42:23
42.81 12.59 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 268649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-05-15 04:42:23 ± 0.288
Latitude 42.81 ± 0.01
Longitude 12.59 ± 0.04
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 268649

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) 3450.6
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) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.01902
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 268649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:13:57

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 268649
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. 1997-05-15T04:43:08.73 10.0 undecidable manual SN 140 0.0128 -0.7 0.5
--.SMB1.Z. 1997-05-15T04:43:00.22 10.0 undecidable manual PN 131 0.019 0.52 1.2
--.PQ9.Z. 1997-05-15T04:42:58.17 10.0 undecidable manual SG 142 0.0088 -0.18 0.8
--.DUI.Z. 1997-05-15T04:42:56.00 10.0 undecidable manual PN 129 0.0161 0.7 1.1
--.CPI2.Z. 1997-05-15T04:42:55.68 10.0 undecidable manual PN 133 0.0159 0.76 1.1
--.FB9.Z. 1997-05-15T04:42:54.61 10.0 undecidable manual SG 8 0.008 -0.77 0.5
--.AQU.Z. 1997-05-15T04:42:51.11 10.0 undecidable manual SG 126 0.0067 0.36 0.8
--.SDI.Z. 1997-05-15T04:42:51.89 10.0 undecidable manual PN 140 0.0128 1.75 0.3
--.ARV.Z. 1997-05-15T04:42:49.90 10.0 undecidable manual SG 20 0.0066 -0.44 0.7
--.SFI.Z. 1997-05-15T04:42:48.26 10.0 undecidable manual PN 334 0.0109 0.88 1.3
--.RSM.Z. 1997-05-15T04:42:47.56 10.0 undecidable manual PN 355 0.0101 1.49 0.6
--.CSNT.Z. 1997-05-15T04:42:45.70 10.0 undecidable manual PN 305 0.0104 -0.79 1.2
--.PQ9.Z. 1997-05-15T04:42:43.97 10.0 undecidable manual PG 142 0.0088 0.23 2
--.FB9.Z. 1997-05-15T04:42:42.18 10.0 undecidable manual PG 8 0.008 0.16 2.1
--.MNS.Z. 1997-05-15T04:42:39.10 10.0 undecidable manual SG 170 0.0038 -1.34 0.3
--.AQU.Z. 1997-05-15T04:42:38.14 10.0 undecidable manual PG 126 0.0067 -1.21 0.9
--.ARV.Z. 1997-05-15T04:42:37.90 10.0 undecidable manual PG 20 0.0066 -1.22 0.8
--.ASS.Z. 1997-05-15T04:42:33.53 10.0 undecidable manual SG 10 0.0023 -0.38 0.7
--.MNS.Z. 1997-05-15T04:42:32.18 10.0 undecidable manual PG 170 0.0038 -1.17 0.9
--.ASS.Z. 1997-05-15T04:42:29.66 10.0 undecidable manual PG 10 0.0023 0.03 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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