ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.7 on date 23-03-2019 and time 11:11:57 (UTC) in region 5 km SW Forlì (FC)

A magnitude ML 1.7 earthquake occured in region: 5 km SW Forlì (FC), on

  • 23-03-2019 11:11:57 (UTC)
  • 23-03-2019 12:11:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.18, 12.02 at 32 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Forlì FC 5 117913 117913
Castrocaro Terme e Terra del Sole FC 5 6426 124339
Meldola FC 7 9970 134309
Forlimpopoli FC 9 13290 147599
Predappio FC 9 6346 153945
Bertinoro FC 10 11059 165004
Dovadola FC 12 1653 166657
Faenza RA 16 58541 225198
Modigliana FC 18 4560 229758
Cesena FC 19 96758 326516
Rocca San Casciano FC 19 1910 328426

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km SW of Forlì (117913 inhabitants)
16 Km SE of Faenza (58541 inhabitants)
19 Km W of Cesena (96758 inhabitants)
30 Km SW of Ravenna (159116 inhabitants)
31 Km SE of Imola (69797 inhabitants)
46 Km W of Rimini (147750 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
76 Km NE of Firenze (382808 inhabitants)
78 Km W of Pesaro (94582 inhabitants)
79 Km SE of Ferrara (133155 inhabitants)
80 Km N of Arezzo (99543 inhabitants)
81 Km E of Prato (191150 inhabitants)
82 Km NE of Scandicci (50609 inhabitants)
89 Km W of Fano (60888 inhabitants)
92 Km E of Pistoia (90315 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 1.7 2019-03-23
11:11:57
44.18 12.02 32 2019-03-23
11:25:03
Sala Sismica INGV-Roma 66834591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-23 11:11:57 ± 0.43
Latitude 44.18 ± 0.02
Longitude 12.02 ± 0.01
Depth (km) 32 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66834591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1575
Semi-minor axis of confidence ellipse (meter) 1193
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 344
Circular confidence region, given by single value of horizontal uncertainty (meter) 1580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 213
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.85436
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 66834591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-23 11:25:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SLCN.HHZ. 2019-03-23T11:13:23.20 3.0 undecidable manual Pg 12.08 0
IV.CMPR.HHZ. 2019-03-23T11:13:19.55 3.0 undecidable manual Pg 9.5 0
CH.FUORN.HHZ. 2019-03-23T11:13:19.39 3.0 undecidable manual Sn -2.31 0
IV.EUCT.HNZ. 2019-03-23T11:13:14.41 3.0 undecidable manual Sg 4.19 0
IV.PTRJ.HHZ. 2019-03-23T11:12:53.13 3.0 undecidable manual Pn -0.48 0
IV.MILN.HNZ. 2019-03-23T11:12:43.66 3.0 undecidable manual Pg 2.99 0
IV.PIEI.HHZ. 2019-03-23T11:12:22.89 0.1 undecidable manual S 150 0.7464 106 0.06 92
IV.NDIM.HHZ. 2019-03-23T11:12:19.50 3.0 negative manual P -3.25 0
IV.RUFI.EHZ. 2019-03-23T11:12:16.40 0.6 undecidable manual S 227 0.5027 115 0.36 47
IV.CAFI.HHZ. 2019-03-23T11:12:14.41 0.3 undecidable manual P 183 0.8544 104 0.53 62
IV.ASQU.HHZ. 2019-03-23T11:12:13.82 0.6 undecidable manual S 203 0.42 119 -0.03 49
IV.MPAG.EHZ. 2019-03-23T11:12:12.58 0.6 undecidable manual P 136 0.7689 106 0.11 46
IV.PIEI.HHZ. 2019-03-23T11:12:11.71 0.3 undecidable manual P 150 0.7464 106 -0.39 65
IV.LMD.HHZ. 2019-03-23T11:12:09.14 0.3 undecidable manual S 245 0.2473 135 -0.61 65
IV.BRIS.HHZ. 2019-03-23T11:12:08.98 0.6 undecidable manual S 283 0.1853 144 0.42 49
IV.RUFI.EHZ. 2019-03-23T11:12:08.34 0.1 undecidable manual P 227 0.5027 115 0.15 97
IV.ASQU.HHZ. 2019-03-23T11:12:06.62 0.1 undecidable manual P 203 0.42 119 -0.3 94
IV.LMD.HHZ. 2019-03-23T11:12:04.24 0.1 negative manual P 245 0.2473 135 -0.31 97
IV.BRIS.HHZ. 2019-03-23T11:12:04.16 0.1 undecidable manual P 283 0.1853 144 0.29 100
IV.BRSN.EHZ. 2019-03-23T11:12:02.83 3.0 positive manual P -1.25 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRSN.EHE. ML:2.8 0.002721557 0.32 AML other m 2019-03-23T11:12:07.37
IV.BRSN.EHN. ML:2.6 0.00177310845 0.16 AML other m 2019-03-23T11:12:07.30
IV.BRSN.HNE. ML:2.7 0.002322235 0.3072 AML other m 2019-03-23T11:12:07.33
IV.BRSN.HNN. ML:2.7 0.0020151055 0.1536 AML other m 2019-03-23T11:12:07.38
IV.BRIS.HHE. ML:1.8 0.0002288022 0.1152 AML other m 2019-03-23T11:12:09.21
IV.BRIS.HHN. ML:1.7 0.00018474575 0.1792 AML other m 2019-03-23T11:12:09.32
IV.BRIS.HNE. ML:1.8 0.000228993115 0.1024 AML other m 2019-03-23T11:12:09.21
IV.BRIS.HNN. ML:1.8 0.00025677405 0.3648 AML other m 2019-03-23T11:12:11.23
IV.LMD.HHE. ML:1.9 0.00029630725 0.1984 AML other m 2019-03-23T11:12:12.39
IV.LMD.HHN. ML:2 0.0003045405 0.1216 AML other m 2019-03-23T11:12:10.10
IV.ASQU.HHE. ML:1.6 9.676167E-5 0.2624 AML other m 2019-03-23T11:12:18.63
IV.ASQU.HHN. ML:1.7 0.0001108233 0.2368 AML other m 2019-03-23T11:12:15.51
IV.RUFI.EHE. ML:1.3 3.9623135E-5 0.32 AML other m 2019-03-23T11:12:20.15
IV.RUFI.EHN. ML:1.5 6.3137815E-5 0.32 AML other m 2019-03-23T11:12:18.74
IV.PIEI.HHE. ML:1.8 7.9558215E-5 0.3392 AML other m 2019-03-23T11:12:24.79
IV.PIEI.HHN. ML:1.6 4.79263E-5 0.4032 AML other m 2019-03-23T11:12:24.95
IV.MPAG.EHE. ML:1.4 2.807294E-5 0.1984 AML other m 2019-03-23T11:12:29.80
IV.CAFI.HNE. ML:1.8 6.217882E-5 0.64 AML other m 2019-03-23T11:12:29.88
IV.CAFI.HHE. ML:1.7 5.2510395E-5 0.6016 AML other m 2019-03-23T11:12:29.86
IV.CAFI.HHN. ML:1.3 2.1997965E-5 0.4032 AML other m 2019-03-23T11:12:31.00
IV.MILN.HHN. ML:3.3 0.0003500114 0.2624 AML other m 2019-03-23T11:13:44.36
IV.MILN.HNE. ML:3.3 0.0003642535 0.2624 AML other m 2019-03-23T11:13:12.84
IV.MILN.HNN. ML:3.3 0.00034144895 0.1984 AML other m 2019-03-23T11:13:02.40
IV.PTRJ.HNE. ML:3.6 0.0003123604 0.1024 AML other m 2019-03-23T11:14:01.78
IV.PTRJ.HNN. ML:3.8 0.00039712235 0.128 AML other m 2019-03-23T11:13:36.00
IV.PTRJ.HHE. ML:2.3 1.383748E-5 0.4608 AML other m 2019-03-23T11:14:06.19
IV.PTRJ.HHN. ML:3.8 0.000397906 0.1408 AML other m 2019-03-23T11:13:36.99
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