Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 16-02-2020 and time 02:59:21 (Italy) in region 4 km E Marradi (FI)

A magnitude ML 0.9 earthquake occured in region: 4 km E Marradi (FI), on

  • 16-02-2020 01:59:21 (UTC)
  • 16-02-2020 02:59:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0890, 11.6640 at 10 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
Marradi FI 4 3139 3139
Tredozio FC 7 1212 4351
Palazzuolo sul Senio FI 10 1154 5505
Portico e San Benedetto FC 12 756 6261
Modigliana FC 13 4560 10821
Rocca San Casciano FC 15 1910 12731
Premilcuore FC 15 799 13530
Casola Valsenio RA 15 2617 16147
Brisighella RA 17 7639 23786
San Godenzo FI 18 1167 24953
Dovadola FC 18 1653 26606
Castel del Rio BO 19 1246 27852

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Faenza (58541 inhabitants)
30 Km S of Imola (69797 inhabitants)
34 Km W of Forlì (117913 inhabitants)
47 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
51 Km E of Prato (191150 inhabitants)
52 Km SE of Bologna (386663 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
72 Km W of Rimini (147750 inhabitants)
83 Km S of Ferrara (133155 inhabitants)
85 Km SE of Modena (184973 inhabitants)
90 Km NE of Siena (53903 inhabitants)
97 Km E of Lucca (89046 inhabitants)
99 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
Reviewed
Rev100 		ML 0.9 2020-02-16
01:59:21		 44.0888 11.6637 10 2020-02-16
02:05:31		 Sala Sismica INGV-Roma 76556711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-16 01:59:21 ± 0.28
Latitude 44.0888 ± 0.0081
Longitude 11.6637 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76556711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 715
Semi-minor axis of confidence ellipse (meter) 635
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 157
Circular confidence region, given by single value of horizontal uncertainty (meter) 720.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 191
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.19245
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 3
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 76556711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-16 02:05:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VISG.HHZ. 2020-02-16T01:59:29.68 0.6 undecidable manual S 301 21.3675 115 0.03 67
IV.BRIS.HHZ. 2020-02-16T01:59:28.43 0.6 undecidable manual S 29 17.1717 120 0.09 66
IV.APEC.HHZ. 2020-02-16T01:59:26.20 3.0 undecidable manual P 0 0
IV.VISG.HHZ. 2020-02-16T01:59:26.17 0.3 positive manual P 301 21.3675 115 -0.03 100
IV.LMD.HHZ. 2020-02-16T01:59:25.02 0.6 undecidable manual S 110 3.6963 159 -0.11 68
IV.BRIS.HHZ. 2020-02-16T01:59:25.35 0.3 positive manual P 29 17.1717 120 -0.1 99
IV.LMD.HHZ. 2020-02-16T01:59:23.79 0.6 positive manual P 110 3.6963 159 0.2 66
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0.4 0.000045363315 0.1408 AML other m 2020-02-16T01:59:25.37
IV.LMD.HHN. ML:0.6 0.00007053422 0.1408 AML other m 2020-02-16T01:59:25.31
IV.BRIS.HNE. ML:1.0 0.00008645412999999999 0.5808 AML other m 2020-02-16T01:59:38.02
IV.BRIS.HNN. ML:1.5 0.00028169668000000006 0.8096 AML other m 2020-02-16T01:59:31.11
IV.BRIS.HHE. ML:0.9 0.00007049483890000001 0.08 AML other m 2020-02-16T01:59:28.52
IV.BRIS.HHN. ML:0.8 0.000058051970000000004 0.3408 AML other m 2020-02-16T01:59:29.09
IV.VISG.HHE. ML:0.2 0.000007742315 0.1808 AML other m 2020-02-16T01:59:30.14
IV.VISG.HHN. ML:0.5 0.000018231235 46 AML other m 2020-02-16T01:59:26.26
IV.APEC.HHE. ML:1.2 0.000018034605000000002 0.1392 AML other m 2020-02-16T01:59:51.51
IV.APEC.HHN. ML:0.9 0.000010970655 0.2208 AML other m 2020-02-16T01:59:38.80
IV.APEC.HNE. ML:2.6 0.0005835831500000001 0.6 AML other m 2020-02-16T01:59:34.46
IV.APEC.HNN. ML:2.8 0.000774676185 0.5904 AML other m 2020-02-16T01:59:32.89
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