Earthquake with magnitude of ML 1.8 on date 28-02-2020 and time 03:15:37 (UTC) in region 4 km NE Marradi (FI)

A magnitude ML 1.8 earthquake occured in region: 4 km NE Marradi (FI), on

  • 28-02-2020 03:15:37 (UTC)
  • 28-02-2020 04:15:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.11, 11.65 at 8 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
Marradi FI 4 3139 3139
Palazzuolo sul Senio FI 8 1154 4293
Tredozio FC 8 1212 5505
Modigliana FC 13 4560 10065
Casola Valsenio RA 13 2617 12682
Portico e San Benedetto FC 14 756 13438
Brisighella RA 16 7639 21077
Rocca San Casciano FC 16 1910 22987
Castel del Rio BO 17 1246 24233
Premilcuore FC 18 799 25032
Fontanelice BO 18 1943 26975
Dovadola FC 19 1653 28628
Borgo Tossignano BO 20 3288 31916
Riolo Terme RA 20 5720 37636
San Godenzo FI 20 1167 38803

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Faenza (58541 inhabitants)
28 Km S of Imola (69797 inhabitants)
34 Km W of Forlì (117913 inhabitants)
48 Km W of Cesena (96758 inhabitants)
49 Km NE of Firenze (382808 inhabitants)
50 Km SE of Bologna (386663 inhabitants)
51 Km E of Prato (191150 inhabitants)
54 Km NE of Scandicci (50609 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
74 Km W of Rimini (147750 inhabitants)
74 Km N of Arezzo (99543 inhabitants)
81 Km S of Ferrara (133155 inhabitants)
83 Km SE of Modena (184973 inhabitants)
91 Km N of Siena (53903 inhabitants)
96 Km E of Lucca (89046 inhabitants)
97 Km SE of Carpi (70699 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 1.8 2020-02-28
03:15:37
44.11 11.65 8 2020-02-28
03:21:29
Sala Sismica INGV-Roma 76881501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-28 03:15:37 ± 0.11
Latitude 44.11 ± 0.01
Longitude 11.65 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76881501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 557
Semi-minor axis of confidence ellipse (meter) 396
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 321
Circular confidence region, given by single value of horizontal uncertainty (meter) 560
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.5333
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 19
Type of magnitude ML
Reference to an origin 76881501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-28 03:21:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-02-28T03:16:17.60 3.0 undecidable manual Sn -0.4 0
IV.CRE.HHZ. 2020-02-28T03:15:56.77 0.3 undecidable manual S 156 0.5333 50 0.25 66
IV.TRIF.CHZ. 2020-02-28T03:15:56.75 3.0 undecidable manual P 0.16 0
IV.PE3.EHZ. 2020-02-28T03:15:53.08 3.0 undecidable manual S -3.29 0
IV.ASQU.HHZ. 2020-02-28T03:15:50.26 0.3 undecidable manual S 162 0.3256 50 -0.09 71
IV.CRE.HHZ. 2020-02-28T03:15:48.31 0.3 undecidable manual P 156 0.5333 50 -0.19 66
IV.RUFI.EHZ. 2020-02-28T03:15:48.70 1.0 undecidable manual S 201 0.286 104 -0.19 23
IV.RINC.HHZ. 2020-02-28T03:15:47.08 0.3 undecidable manual S 188 0.2221 108 0.58 64
IV.SFI.EHZ. 2020-02-28T03:15:47.38 0.6 undecidable manual S 145 0.2464 106 -0.04 48
IV.BRSN.EHZ. 2020-02-28T03:15:46.27 0.1 undecidable manual P 60 0.357 50 0.8 76
IV.RONT.HHZ. 2020-02-28T03:15:46.05 0.6 undecidable manual S 234 0.1916 110 0.64 42
IV.SEI.HHZ. 2020-02-28T03:15:46.23 0.3 undecidable manual S 256 0.2149 108 -0.01 73
IV.ASQU.HHZ. 2020-02-28T03:15:44.47 0.1 undecidable manual P 162 0.3256 50 -0.47 87
IV.BRIS.HHZ. 2020-02-28T03:15:43.80 0.3 undecidable manual S 35 0.1457 116 0.04 74
IV.SFI.EHZ. 2020-02-28T03:15:43.04 0.1 undecidable manual P 145 0.2464 106 -0.2 93
IV.RUFI.EHZ. 2020-02-28T03:15:43.79 0.1 positive manual P 201 0.286 104 -0.3 91
IV.SEI.HHZ. 2020-02-28T03:15:42.30 0.1 positive manual P 256 0.2149 108 -0.26 93
IV.RINC.HHZ. 2020-02-28T03:15:42.73 0.1 positive manual P 188 0.2221 108 0.02 98
IV.RONT.HHZ. 2020-02-28T03:15:42.19 0.1 positive manual P 234 0.1916 110 0.11 96
IV.VISG.HHZ. 2020-02-28T03:15:41.26 3.0 undecidable manual Pn -1.59 0
IV.BRIS.HHZ. 2020-02-28T03:15:40.93 0.1 positive manual P 35 0.1457 116 -0.2 95
IV.LMD.HHZ. 2020-02-28T03:15:40.98 0.3 undecidable manual S 124 0.0513 144 0.09 75
IV.LMD.HHZ. 2020-02-28T03:15:39.42 0.1 positive manual P 124 0.0513 144 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0 0.0013464665 0.2992 AML other m 2020-02-28T03:15:41.84
IV.LMD.HHN. ML:0 0.001458312 0.3216 AML other m 2020-02-28T03:15:41.11
IV.BRIS.HNN. ML:1.5 0.00032138785 0.3104 AML other m 2020-02-28T03:15:43.17
IV.BRIS.HHE. ML:2.2 0.001616253 0.3408 AML other m 2020-02-28T03:15:47.12
IV.BRIS.HHN. ML:2.4 0.0026011975 0.3408 AML other m 2020-02-28T03:15:44.75
IV.VISG.HHE. ML:1.7 0.0004234451 0.1392 AML other m 2020-02-28T03:15:45.95
IV.VISG.HHN. ML:2 0.00078186015 0.1008 AML other m 2020-02-28T03:15:44.93
IV.RONT.HHE. ML:2.1 0.00085141595 0.36 AML other m 2020-02-28T03:15:48.22
IV.RONT.HHN. ML:2.1 0.0009446526 0.12 AML other m 2020-02-28T03:15:46.60
IV.SEI.HHE. ML:2.2 0.0011156068 0.5392 AML other m 2020-02-28T03:15:46.73
IV.SEI.HHN. ML:2.3 0.0013893795 0.2992 AML other m 2020-02-28T03:15:46.67
IV.RINC.HHE. ML:1.7 0.000287191 0.5008 AML other m 2020-02-28T03:15:50.32
IV.RINC.HHN. ML:1.6 0.00022128825 0.5792 AML other m 2020-02-28T03:15:57.01
IV.SFI.HNE. ML:1.6 0.00020557996 0.4208 AML other m 2020-02-28T03:15:49.66
IV.SFI.HNN. ML:1.7 0.0002942417 0.4592 AML other m 2020-02-28T03:15:48.02
IV.SFI.EHE. ML:1.6 0.00024521645 0.52 AML other m 2020-02-28T03:15:49.65
IV.SFI.EHN. ML:1.7 0.0002777822 0.4592 AML other m 2020-02-28T03:15:47.79
IV.RUFI.EHE. ML:1.3 0.000101605595 0.52 AML other m 2020-02-28T03:15:52.07
IV.RUFI.EHN. ML:1.4 0.00011118603 0.3808 AML other m 2020-02-28T03:15:53.14
IV.ASQU.HHE. ML:1.7 0.0001864105 0.3008 AML other m 2020-02-28T03:15:50.41
IV.ASQU.HHN. ML:1.6 0.0001667958 0.2592 AML other m 2020-02-28T03:15:55.47
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