Earthquake with magnitude of Md 3.4 on date 26-07-1997 and time 07:48:26 (Italy) in region 9 km SW Castel Ritaldi (PG)

A magnitude Md 3.4 earthquake occured in region: 9 km SW Castel Ritaldi (PG), on

  • 26-07-1997 05:48:26 (UTC)
  • 26-07-1997 07:48:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 12.63 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
Castel Ritaldi PG 9 3278 3278
Massa Martana PG 9 3770 7048
Spoleto PG 9 38218 45266
Acquasparta TR 10 4778 50044
Giano dell'Umbria PG 10 3846 53890
Campello sul Clitunno PG 14 2442 56332
Montefalco PG 16 5679 62011
Montecastrilli TR 16 5022 67033
Trevi PG 17 8469 75502
San Gemini TR 17 5018 80520
Sant'Anatolia di Narco PG 17 564 81084
Scheggino PG 17 461 81545
Gualdo Cattaneo PG 18 6155 87700
Todi PG 18 16851 104551
Vallo di Nera PG 19 364 104915
Avigliano Umbro TR 20 2558 107473
Ferentillo TR 20 1913 109386
Bevagna PG 20 5081 114467

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km N of Terni (111501 inhabitants)
23 Km S of Foligno (57155 inhabitants)
44 Km SE of Perugia (166134 inhabitants)
57 Km NE of Viterbo (67173 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
84 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km W of Teramo (54892 inhabitants)
89 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 inhabitants)
100 Km SE of Arezzo (99543 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 3.4
ML-VAX 2.3
1997-07-26
05:48:26
42.76 12.63 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 274009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-07-26 05:48:26 ± 0.227
Latitude 42.76 ± 0.01
Longitude 12.63 ± 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 274009

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) 3466.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1
Epicentral distance of station closest to the epicenter (degree) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.03643
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

Md:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 274009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:18:56

ML:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 274009
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
--.BR9.Z. 1997-07-26T05:49:30.48 10.0 undecidable manual PN 337 0.0364 1.57 0.4
--.SDI.Z. 1997-07-26T05:49:11.85 10.0 undecidable manual SN 139 0.0122 1.1 0.5
--.SFI.Z. 1997-07-26T05:49:09.45 10.0 undecidable manual SN 334 0.0115 0.68 0.7
--.CSNT.Z. 1997-07-26T05:49:06.65 10.0 undecidable manual SN 306 0.0108 -0.45 0.8
--.EB9.Z. 1997-07-26T05:49:05.23 10.0 undecidable manual PN 316 0.0207 0.2 1.4
--.GU9.Z. 1997-07-26T05:49:04.60 10.0 undecidable manual PN 317 0.0195 0.9 1.1
--.ZC9.Z. 1997-07-26T05:49:01.25 10.0 undecidable manual PN 323 0.0179 0.56 1.4
--.BDI.Z. 1997-07-26T05:49:00.89 10.0 undecidable manual PN 312 0.0177 0.53 1.5
--.RDP.Z. 1997-07-26T05:49:00.78 10.0 undecidable manual SG 176 0.009 -0.63 0.7
--.PQ9.Z. 1997-07-26T05:48:59.27 10.0 undecidable manual SG 141 0.0083 0.1 0.8
--.PLI2.Z. 1997-07-26T05:48:56.80 10.0 undecidable manual PN 138 0.0146 1.25 1
--.SDI.Z. 1997-07-26T05:48:53.16 10.0 undecidable manual PN 139 0.0122 1.12 1.3
--.ARV.Z. 1997-07-26T05:48:53.97 10.0 undecidable manual SG 17 0.007 -0.37 0.8
--.SFI.Z. 1997-07-26T05:48:50.65 10.0 undecidable manual PN 334 0.0115 -0.25 2
--.RSM.Z. 1997-07-26T05:48:50.30 10.0 undecidable manual PN 353 0.0106 0.51 1.9
--.RDP.Z. 1997-07-26T05:48:48.40 10.0 undecidable manual PG 176 0.009 1.75 0.7
--.CSNT.Z. 1997-07-26T05:48:48.25 10.0 undecidable manual PN 306 0.0108 -1.68 0.8
--.PQ9.Z. 1997-07-26T05:48:46.78 10.0 undecidable manual PG 141 0.0083 1.42 1
--.RMP.Z. 1997-07-26T05:48:44.70 10.0 undecidable manual PG 176 0.0085 -1.59 0.8
--.ARV.Z. 1997-07-26T05:48:40.89 10.0 undecidable manual PG 17 0.007 -1.67 0.8
--.AQU.Z. 1997-07-26T05:48:39.68 10.0 undecidable manual PG 124 0.0062 -1.38 1
--.MNS.Z. 1997-07-26T05:48:39.63 10.0 undecidable manual SG 173 0.0033 -1.3 0.5
--.ASS.Z. 1997-07-26T05:48:37.85 10.0 undecidable manual SG 3 0.0028 -0.6 0.7
--.ASS.Z. 1997-07-26T05:48:32.58 10.0 undecidable manual PG 3 0.0028 -0.81 1.6
--.MNS.Z. 1997-07-26T05:48:32.97 10.0 undecidable manual PG 173 0.0033 -1.86 0.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download