Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-10-2017 and time 12:01:49 (Italy) in region 5 km S Faenza (RA)

A magnitude ML 1.5 earthquake occured in region: 5 km S Faenza (RA), on

  • 20-10-2017 10:01:49 (UTC)
  • 20-10-2017 12:01:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2450, 11.8720 at 23 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Faenza RA 5 58541 58541
Brisighella RA 9 7639 66180
Castrocaro Terme e Terra del Sole FC 10 6426 72606
Castel Bolognese RA 10 9554 82160
Modigliana FC 12 4560 86720
Riolo Terme RA 12 5720 92440
Solarolo RA 13 4488 96928
Forlì FC 14 117913 214841
Dovadola FC 14 1653 216494
Bagnara di Romagna RA 17 2429 218923
Cotignola RA 17 7474 226397
Imola BO 17 69797 296194
Mordano BO 18 4760 300954
Predappio FC 18 6346 307300
Russi RA 19 12247 319547
Lugo RA 20 32390 351937
Casola Valsenio RA 20 2617 354554
Meldola FC 20 9970 364524

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km S of Faenza (58541 inhabitants)
14 Km W of Forlì (117913 inhabitants)
17 Km SE of Imola (69797 inhabitants)
32 Km W of Cesena (96758 inhabitants)
33 Km SW of Ravenna (159116 inhabitants)
50 Km SE of Bologna (386663 inhabitants)
59 Km W of Rimini (147750 inhabitants)
69 Km SE of Ferrara (133155 inhabitants)
72 Km NE of Firenze (382808 inhabitants)
74 Km NE of Prato (191150 inhabitants)
77 Km NE of Scandicci (50609 inhabitants)
84 Km E of Pistoia (90315 inhabitants)
86 Km N of Arezzo (99543 inhabitants)
87 Km SE of Modena (184973 inhabitants)
91 Km W of Pesaro (94582 inhabitants)
92 Km S of Rovigo (51867 inhabitants)
98 Km SE of Carpi (70699 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 		ML 1.5 2017-10-20
10:01:49		 44.2448 11.8717 23 2018-09-04
09:08:00		 Bollettino Sismico Italiano INGV 55113321
Reviewed
Rev100 		ML 1.5 2017-10-20
10:01:49		 44.2898 11.975 11 2017-10-20
10:08:09		 Sala Sismica INGV-Roma 51155281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-10-20 10:01:49 ± 0.76
Latitude 44.2448 ± 0.0315
Longitude 11.8717 ± 0.0439
Depth (km) 23 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 55113321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3897
Semi-minor axis of confidence ellipse (meter) 2406
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 3900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 210
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.41459
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.0
Num. used stations 1
Type of magnitude ML
Reference to an origin 55113321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-08-27 14:56:05

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 51155281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-10-20 10:08:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2017-10-20T10:02:04.52 0.3 undecidable manual S 243 46.0206 110 -0.46 66
IV.MTRZ.HHZ. 2017-10-20T10:02:03.54 0.6 undecidable manual S 282 36.3414 116 0.95 41
IV.LMD.HHZ. 2017-10-20T10:02:00.05 0.3 undecidable manual S 215 22.755 130 0.53 64
IV.SEI.HHZ. 2017-10-20T10:01:58.18 0.3 undecidable manual P 243 46.0206 110 -0.33 66
IV.MTRZ.HHZ. 2017-10-20T10:01:57.17 0.1 positive manual P 282 36.3414 116 0.05 95
IV.BRIS.HHZ. 2017-10-20T10:01:56.38 0.6 undecidable manual S 255 8.6802 157 -0.87 42
IV.LMD.HHZ. 2017-10-20T10:01:56.03 0.1 undecidable manual P 215 22.755 130 0.68 87
IV.FAEN.HNZ. 2017-10-20T10:01:56.92 0.6 undecidable manual S 5 4.995 166 -0.02 52
IV.BRIS.HHZ. 2017-10-20T10:01:53.91 0.1 positive manual P 255 8.6802 157 -0.14 100
IV.FAEN.HNZ. 2017-10-20T10:01:53.39 0.3 undecidable manual P 5 4.995 166 -0.48 68
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHN. ML:1.5 0.00009172831000000001 0.5248 AML other m 2017-10-20T10:02:10.13
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download