Earthquake with magnitude of Md 3.7 on date 27-07-1997 and time 14:01:22 (Italy) in region 4 km W Foligno (PG)

A magnitude Md 3.7 earthquake occured in region: 4 km W Foligno (PG), on

  • 27-07-1997 12:01:22 (UTC)
  • 27-07-1997 14:01:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.95, 12.66 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
Foligno PG 4 57155 57155
Bevagna PG 4 5081 62236
Spello PG 5 8645 70881
Montefalco PG 6 5679 76560
Cannara PG 8 4305 80865
Gualdo Cattaneo PG 10 6155 87020
Trevi PG 10 8469 95489
Castel Ritaldi PG 14 3278 98767
Giano dell'Umbria PG 14 3846 102613
Assisi PG 14 28299 130912
Valtopina PG 15 1398 132310
Bettona PG 16 4367 136677
Bastia Umbra PG 16 21874 158551
Campello sul Clitunno PG 17 2442 160993
Collazzone PG 19 3473 164466

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km W of Foligno (57155 inhabitants)
29 Km SE of Perugia (166134 inhabitants)
43 Km N of Terni (111501 inhabitants)
74 Km NE of Viterbo (67173 inhabitants)
86 Km SE of Arezzo (99543 inhabitants)
90 Km NW of L'Aquila (69753 inhabitants)
91 Km W of Teramo (54892 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 3.7
ML-VAX 2.9
1997-07-27
12:01:22
42.95 12.66 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 274119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-07-27 12:01:22 ± 0.172
Latitude 42.95 ± 0.01
Longitude 12.66 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 274119

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) 2999.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.04306
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

Md:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 274119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:19:02

ML:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 15
Type of magnitude ML
Reference to an origin 274119
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. 1997-07-27T12:02:50.47 10.0 undecidable manual SN 347 0.0286 0.97 0.3
--.BOB.Z. 1997-07-27T12:02:42.75 10.0 undecidable manual SN 309 0.0265 -1.11 0.3
--.BNI.Z. 1997-07-27T12:02:36.23 10.0 undecidable manual PN 298 0.0431 1.67 0.2
--.DOI.Z. 1997-07-27T12:02:26.71 10.0 undecidable manual PN 293 0.0379 0.09 1.1
--.BR9.Z. 1997-07-27T12:02:23.12 10.0 undecidable manual PN 336 0.0349 0.97 0.7
--.VAI.Z. 1997-07-27T12:02:22.37 10.0 undecidable manual PN 317 0.0362 -1.77 0.2
--.GU9.Z. 1997-07-27T12:02:21.88 10.0 undecidable manual SN 313 0.0185 -0.79 0.5
--.FVI.Z. 1997-07-27T12:02:20.50 10.0 undecidable manual PN 1 0.0328 1.16 0.6
--.PTCC.Z. 1997-07-27T12:02:17.11 10.0 undecidable manual PN 7 0.0314 0.34 1.1
--.CKI.Z. 1997-07-27T12:02:16.95 10.0 undecidable manual PN 296 0.0314 0.16 1.2
--.CTI.Z. 1997-07-27T12:02:12.81 10.0 undecidable manual PN 347 0.0286 0.29 1.2
--.SAL.Z. 1997-07-27T12:02:11.63 10.0 undecidable manual PN 330 0.0276 0.69 1
--.SDI.Z. 1997-07-27T12:02:11.25 10.0 undecidable manual SN 145 0.0134 1.74 0.1
--.BOB.Z. 1997-07-27T12:02:10.68 10.0 undecidable manual PN 309 0.0265 1.41 0.5
--.VVI.Z. 1997-07-27T12:02:10.78 10.0 undecidable manual PN 356 0.0273 0.24 1.3
--.TRI.Z. 1997-07-27T12:02:08.22 10.0 undecidable manual PN 15 0.0258 -0.03 1.4
--.RDP.Z. 1997-07-27T12:02:03.26 10.0 undecidable manual SN 178 0.0107 1.16 0.3
--.RMP.Z. 1997-07-27T12:02:01.88 10.0 undecidable manual SN 178 0.0102 1.04 0.4
--.CSNT.Z. 1997-07-27T12:02:01.73 10.0 undecidable manual SN 298 0.0101 1.06 0.4
--.SFI.Z. 1997-07-27T12:02:00.82 10.0 undecidable manual SN 328 0.0101 0.24 0.6
--.PQ9.Z. 1997-07-27T12:01:59.93 10.0 undecidable manual SG 149 0.0096 0.63 0.5
--.EB9.Z. 1997-07-27T12:01:59.38 10.0 undecidable manual PN 312 0.0197 0.44 1.4
--.RSM.Z. 1997-07-27T12:01:58.45 10.0 undecidable manual SG 351 0.0089 1.69 0.2
--.GU9.Z. 1997-07-27T12:01:57.15 10.0 undecidable manual PN 313 0.0185 0.12 1.6
--.ZC9.Z. 1997-07-27T12:01:55.91 10.0 undecidable manual PN 319 0.0167 1.55 0.5
--.BDI.Z. 1997-07-27T12:01:53.75 10.0 undecidable manual PN 307 0.0168 -0.71 1.3
--.PII.Z. 1997-07-27T12:01:52.52 10.0 undecidable manual PN 297 0.0156 -0.15 1.6
--.SDI.Z. 1997-07-27T12:01:51.25 10.0 undecidable manual PN 145 0.0134 1.82 0.3
--.AQU.Z. 1997-07-27T12:01:51.83 10.0 undecidable manual SG 137 0.0072 1.14 0.3
--.BS9.Z. 1997-07-27T12:01:48.23 10.0 undecidable manual PN 342 0.0125 0.16 1.6
--.RDP.Z. 1997-07-27T12:01:44.70 10.0 undecidable manual PN 178 0.0107 -0.45 1.5
--.CSNT.Z. 1997-07-27T12:01:43.55 10.0 undecidable manual PN 298 0.0101 -0.77 1.2
--.PQ9.Z. 1997-07-27T12:01:43.92 10.0 undecidable manual PG 149 0.0096 0.38 1.5
--.SFI.Z. 1997-07-27T12:01:43.00 10.0 negative manual PN 328 0.0101 -1.28 1.5
--.RMP.Z. 1997-07-27T12:01:43.35 10.0 negative manual PN 178 0.0102 -1.07 1.9
--.RSM.Z. 1997-07-27T12:01:41.40 10.0 undecidable manual PG 351 0.0089 -1.03 1
--.AQU.Z. 1997-07-27T12:01:37.58 10.0 negative manual PG 137 0.0072 -0.99 2
--.MNS.Z. 1997-07-27T12:01:33.14 10.0 positive manual PG 178 0.005 -0.93 2.2
--.ARV.Z. 1997-07-27T12:01:32.90 10.0 positive manual PG 20 0.0053 -1.67 0.8
--.ASS.Z. 1997-07-27T12:01:24.76 10.0 positive manual PG 356 0.001 0 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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