Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 16-11-2019 and time 04:49:31 (UTC) in region 2 km W Tredozio (FC)

A magnitude ML 1.6 earthquake occured in region: 2 km W Tredozio (FC), on

  • 16-11-2019 04:49:31 (UTC)
  • 16-11-2019 05:49:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.08, 11.72 at 24 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Tredozio FC 2 1212 1212
Portico e San Benedetto FC 8 756 1968
Marradi FI 9 3139 5107
Rocca San Casciano FC 10 1910 7017
Modigliana FC 10 4560 11577
Premilcuore FC 13 799 12376
Dovadola FC 14 1653 14029
Palazzuolo sul Senio FI 14 1154 15183
Brisighella RA 16 7639 22822
Casola Valsenio RA 18 2617 25439
Galeata FC 18 2516 27955
San Godenzo FI 19 1167 29122
Civitella di Romagna FC 19 3786 32908

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Faenza (58541 inhabitants)
30 Km SW of Forlì (117913 inhabitants)
30 Km S of Imola (69797 inhabitants)
42 Km W of Cesena (96758 inhabitants)
51 Km NE of Firenze (382808 inhabitants)
53 Km SW of Ravenna (159116 inhabitants)
55 Km E of Prato (191150 inhabitants)
55 Km SE of Bologna (386663 inhabitants)
56 Km NE of Scandicci (50609 inhabitants)
66 Km E of Pistoia (90315 inhabitants)
68 Km W of Rimini (147750 inhabitants)
70 Km N of Arezzo (99543 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
89 Km SE of Modena (184973 inhabitants)
90 Km NE of Siena (53903 inhabitants)
97 Km W of Pesaro (94582 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.6 2019-11-16
04:49:31		 44.08 11.72 24 2019-11-16
04:57:34		 Sala Sismica INGV-Roma 73871001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-11-16 04:49:31 ± 0.22
Latitude 44.08 ± 0.01
Longitude 11.72 ± 0.01
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73871001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1001
Semi-minor axis of confidence ellipse (meter) 356
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 94
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32735
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 73871001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-11-16 04:57:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MILN.HHZ. 2019-11-16T04:50:55.41 3.0 undecidable manual Sn 5.52 0
IV.IMI.HHZ. 2019-11-16T04:50:53.75 3.0 undecidable manual Sn 0.42 0
IV.GMB.BHZ. 2019-11-16T04:50:42.48 3.0 undecidable manual Pg 17.959999 0
IX.STN3.HHZ.02 2019-11-16T04:50:33.26 3.0 undecidable manual Sn 2.2 0
IV.NOV.HHZ. 2019-11-16T04:50:29.59 3.0 undecidable manual Pg 5.8 0
IV.CRJA.HHZ. 2019-11-16T04:50:25.90 3.0 positive manual Pn 2.22 0
IV.PETRA.HHZ. 2019-11-16T04:50:14.24 3.0 undecidable manual Pn -9.75 0
IV.CRMI.HHZ. 2019-11-16T04:50:10.43 3.0 undecidable manual Sg 9.01 0
IV.PLMA.HHZ. 2019-11-16T04:50:03.28 3.0 positive manual Pg 13.11 0
ST.RONC.EHZ. 2019-11-16T04:50:00.49 3.0 undecidable manual Pn -2.16 0
IV.LAV9.HHZ. 2019-11-16T04:49:47.85 3.0 undecidable manual S -0.86 0
IV.SGTA.HHZ. 2019-11-16T04:49:44.08 3.0 undecidable manual Pn -3.15 0
IV.ASQU.HHZ. 2019-11-16T04:49:43.53 0.6 undecidable manual S 170 0.2896 120 0.36 47
IV.SEI.HHZ. 2019-11-16T04:49:42.72 0.3 undecidable manual S 264 0.2617 123 0.25 72
IV.SFI.EHZ. 2019-11-16T04:49:41.12 0.6 undecidable manual S 153 0.1988 132 0.13 50
IV.BRIS.HHZ. 2019-11-16T04:49:40.28 0.3 undecidable manual S 13 0.1457 142 0.36 73
IV.LMD.HHZ. 2019-11-16T04:49:38.43 0.3 undecidable manual S 245 0.0108 177 -0.02 80
IV.CRMI.HHZ. 2019-11-16T04:49:38.20 3.0 negative manual Pn -0.58 0
IV.ASQU.HHZ. 2019-11-16T04:49:38.15 0.1 undecidable manual P 170 0.2896 120 0.06 100
IV.BRSN.EHE. 2019-11-16T04:49:38.76 0.3 undecidable manual P 52 0.3274 117 0.11 74
IV.IMOL.EHZ. 2019-11-16T04:49:38.19 0.1 positive manual P 3 0.2779 121 0.28 96
IV.SEI.HHZ. 2019-11-16T04:49:37.57 0.1 undecidable manual P 264 0.2617 123 -0.11 100
IV.SFI.EHZ. 2019-11-16T04:49:36.66 0.6 undecidable manual P 153 0.1988 132 -0.17 50
IV.BRIS.HHZ. 2019-11-16T04:49:35.84 0.1 undecidable manual P 13 0.1457 142 -0.37 97
IV.LMD.HHZ. 2019-11-16T04:49:34.82 0.1 positive manual P 245 0.0108 177 -0.54 95
IV.OFFI.HHZ. 2019-11-16T04:49:23.08 3.0 undecidable manual P 1.54 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.8 0.000472 0.18 AML other m 2019-11-16T04:49:38.75
IV.LMD.HHN. ML:1.7 0.0003525 1.72 AML other m 2019-11-16T04:49:38.04
IV.BRIS.HHN. ML:1.7 0.0002915 0.42 AML other m 2019-11-16T04:49:40.91
IV.SFI.EHN. ML:1.6 0.000196 0.42 AML other m 2019-11-16T04:49:41.44
IV.SFI.EHE. ML:1.7 0.000224 0.6 AML other m 2019-11-16T04:49:41.55
IV.SEI.HHE. ML:1.8 0.000215 1 AML other m 2019-11-16T04:49:43.88
IV.SEI.HHN. ML:1.8 0.00027 0.24 AML other m 2019-11-16T04:49:44.07
IV.BRIS.HHE. ML:1.5 0.0001638337 0.4576 AML other m 2019-11-16T04:49:40.61
IV.BRIS.HNE. ML:1.6 0.00024133665 0.4608 AML other m 2019-11-16T04:49:44.63
IV.BRIS.HNN. ML:1.7 0.00025312155 0.1792 AML other m 2019-11-16T04:49:40.91
IV.SFI.HNE. ML:1.5 0.000162074935 0.2208 AML other m 2019-11-16T04:49:42.47
IV.SFI.HNN. ML:1.6 0.0001873207 0.5024 AML other m 2019-11-16T04:49:41.40
IV.ASQU.HHE. ML:1.4 8.659421E-5 0.2208 AML other m 2019-11-16T04:49:45.25
IV.ASQU.HHN. ML:1.1 4.294723E-5 0.1984 AML other m 2019-11-16T04:49:45.61
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