Earthquake with magnitude of ML 1.9 on date 20-04-2020 and time 11:56:24 (UTC) in region 6 km S Faenza (RA)

A magnitude ML 1.9 earthquake occured in region: 6 km S Faenza (RA), on

  • 20-04-2020 11:56:24 (UTC)
  • 20-04-2020 13:56:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.23, 11.9 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.

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 6 58541 58541
Castrocaro Terme e Terra del Sole FC 7 6426 64967
Brisighella RA 11 7639 72606
Forlì FC 11 117913 190519
Modigliana FC 12 4560 195079
Dovadola FC 12 1653 196732
Castel Bolognese RA 13 9554 206286
Solarolo RA 15 4488 210774
Riolo Terme RA 15 5720 216494
Predappio FC 16 6346 222840
Meldola FC 17 9970 232810
Cotignola RA 17 7474 240284
Forlimpopoli FC 19 13290 253574
Bagnara di Romagna RA 19 2429 256003
Russi RA 19 12247 268250
Rocca San Casciano FC 20 1910 270160
Mordano BO 20 4760 274920

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km S of Faenza (58541 inhabitants)
11 Km W of Forlì (117913 inhabitants)
20 Km SE of Imola (69797 inhabitants)
29 Km W of Cesena (96758 inhabitants)
31 Km SW of Ravenna (159116 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
56 Km W of Rimini (147750 inhabitants)
71 Km SE of Ferrara (133155 inhabitants)
73 Km NE of Firenze (382808 inhabitants)
75 Km NE of Prato (191150 inhabitants)
78 Km NE of Scandicci (50609 inhabitants)
85 Km N of Arezzo (99543 inhabitants)
86 Km E of Pistoia (90315 inhabitants)
88 Km W of Pesaro (94582 inhabitants)
90 Km SE of Modena (184973 inhabitants)
94 Km S of Rovigo (51867 inhabitants)
99 Km W of Fano (60888 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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
Bulletin
Rev1000
ML 1.9 2020-04-20
11:56:24
44.23 11.9 23 2020-07-18
21:08:36
Bollettino Sismico Italiano INGV 78964121
Reviewed
Rev100
ML 2.0 2020-04-20
11:56:24
44.24 11.95 23 2020-04-20
12:05:10
Sala Sismica INGV-Roma 78414211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-20 11:56:24 ± 0.25
Latitude 44.23 ± 0.01
Longitude 11.90 ± 0.02
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78964121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1200
Semi-minor axis of confidence ellipse (meter) 509
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 106
Circular confidence region, given by single value of horizontal uncertainty (meter) 1200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.48653
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 78964121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-22 19:54:23

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 78414211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-20 12:05:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2020-04-20T11:56:42.60 0.6 undecidable manual S 216 0.4865 105 0.5 43
IV.ASQU.HHZ. 2020-04-20T11:56:41.50 0.6 undecidable manual S 191 0.4443 107 0.61 41
IV.RONT.HHZ. 2020-04-20T11:56:40.50 0.6 undecidable manual S 235 0.4146 109 0.44 44
IV.SEI.HHZ. 2020-04-20T11:56:40.76 0.6 undecidable manual S 246 0.4308 108 0.25 46
IV.SFI.EHZ. 2020-04-20T11:56:38.00 0.3 undecidable manual S 187 0.331 114 0.25 70
IV.LMD.HHZ. 2020-04-20T11:56:34.40 0.3 undecidable manual S 222 0.2104 128 -0.27 73
IV.BRSN.EHZ. 2020-04-20T11:56:34.73 0.6 undecidable manual S 68 0.1358 142 1.64 27
IV.RUFI.EHZ. 2020-04-20T11:56:34.76 0.3 undecidable manual P 216 0.4865 105 -0.03 71
IV.IMOL.EHZ. 2020-04-20T11:56:34.30 0.3 undecidable manual S 317 0.1718 134 0.5 69
IV.ASQU.HHZ. 2020-04-20T11:56:34.02 0.3 undecidable manual P 191 0.4443 107 -0.07 71
IV.RONT.HHZ. 2020-04-20T11:56:33.63 0.3 undecidable manual P 235 0.4146 109 0.01 73
IV.SEI.HHZ. 2020-04-20T11:56:33.83 0.1 undecidable manual P 246 0.4308 108 -0.05 96
IV.MTRZ.HHZ. 2020-04-20T11:56:33.17 0.1 undecidable manual P 283 0.3525 112 0.55 88
IV.RINC.HHN. 2020-04-20T11:56:33.36 0.1 undecidable manual P 212 0.4074 109 -0.13 95
IV.SFI.EHZ. 2020-04-20T11:56:32.14 0.1 negative manual P 187 0.331 114 -0.14 96
IT.FAZ.HNZ. 2020-04-20T11:56:32.55 0.6 undecidable manual S 351 0.0657 160 0.48 47
IV.FAEN.HNE. 2020-04-20T11:56:32.10 0.3 undecidable manual S 341 0.0594 162 0.09 77
IV.BRIS.HHZ. 2020-04-20T11:56:32.00 0.3 undecidable manual S 265 0.0998 151 -0.49 71
IV.LMD.HHZ. 2020-04-20T11:56:30.04 0.1 negative manual P 222 0.2104 128 -0.46 92
IV.BRSN.EHZ. 2020-04-20T11:56:29.57 0.3 undecidable manual P 68 0.1358 142 -0.01 76
IV.IMOL.EHZ. 2020-04-20T11:56:29.94 0.1 positive manual P 317 0.1718 134 -0.06 100
IV.FAEN.HNE. 2020-04-20T11:56:28.58 0.3 undecidable manual P 341 0.0594 162 -0.39 72
IV.BRIS.HHZ. 2020-04-20T11:56:28.72 0.1 positive manual P 265 0.0998 151 -0.52 92
IT.FAZ.HNZ. 2020-04-20T11:56:28.66 0.1 undecidable manual P 351 0.0657 160 -0.34 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:1.8 0.000385 0.32 AML other m 2020-04-20T11:56:32.35
IV.BRIS.HHN. ML:1.9 0.000548 0.28 AML other m 2020-04-20T11:56:32.35
IV.BRSN.EHE. ML:2.3 0.0011675 0.64 AML other m 2020-04-20T11:56:34.07
IV.LMD.HHN. ML:2.4 0.001076 0.18 AML other m 2020-04-20T11:56:34.70
IV.LMD.HHE. ML:2.2 0.0007825 0.2 AML other m 2020-04-20T11:56:34.71
IV.BRSN.EHN. ML:2.2 0.0010415 0.94 AML other m 2020-04-20T11:56:34.26
IV.BRSN.HNN. ML:2.2 0.0009655 0.94 AML other m 2020-04-20T11:56:34.26
IV.IMOL.HNE. ML:2 0.0005195 0.14 AML other m 2020-04-20T11:56:35.12
IV.IMOL.HNN. ML:2.1 0.000621 0.72 AML other m 2020-04-20T11:56:35.75
IV.BRSN.HNE. ML:2.3 0.001087 1.56 AML other m 2020-04-20T11:56:35.07
IV.SFI.EHN. ML:1.6 0.0001245 0.54 AML other m 2020-04-20T11:56:38.46
IV.SFI.EHE. ML:1.6 0.000135 0.22 AML other m 2020-04-20T11:56:39.15
IV.RONT.HHE. ML:1.9 0.0001985 1.06 AML other m 2020-04-20T11:56:41.33
IV.RONT.HHN. ML:2 0.000288 0.32 AML other m 2020-04-20T11:56:41.54
IV.MTRZ.HHE. ML:1.6 0.000137 0.52 AML other m 2020-04-20T11:56:42.18
IV.ASQU.HHE. ML:1.6 8.925E-5 0.24 AML other m 2020-04-20T11:56:43.17
IV.ASQU.HHN. ML:1.5 7.435E-5 0.78 AML other m 2020-04-20T11:56:43.31
IV.MTRZ.HHN. ML:1.4 8.725E-5 0.56 AML other m 2020-04-20T11:56:43.74
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download