Earthquake with magnitude of ML 1.3 on date 21-04-2022 and time 22:39:36 (UTC) in region 3 km SW Marradi (FI)

A magnitude ML 1.3 earthquake occured in region: 3 km SW Marradi (FI), on

  • 21-04-2022 22:39:36 (UTC)
  • 22-04-2022 00:39:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0500, 11.5950 at 9 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
Marradi FI 3 3139 3139
Palazzuolo sul Senio FI 8 1154 4293
Tredozio FC 12 1212 5505
San Godenzo FI 14 1167 6672
Portico e San Benedetto FC 15 756 7428
Vicchio FI 17 8044 15472
Premilcuore FC 17 799 16271
Dicomano FI 18 5515 21786
Firenzuola FI 19 4726 26512
Casola Valsenio RA 20 2617 29129
Castel del Rio BO 20 1246 30375
Borgo San Lorenzo FI 20 18211 48586
Modigliana FC 20 4560 53146
Rocca San Casciano FC 20 1910 55056

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Faenza (58541 inhabitants)
35 Km S of Imola (69797 inhabitants)
41 Km W of Forlì (117913 inhabitants)
41 Km NE of Firenze (382808 inhabitants)
44 Km E of Prato (191150 inhabitants)
46 Km NE of Scandicci (50609 inhabitants)
53 Km W of Cesena (96758 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
56 Km E of Pistoia (90315 inhabitants)
63 Km SW of Ravenna (159116 inhabitants)
69 Km NW of Arezzo (99543 inhabitants)
78 Km W of Rimini (147750 inhabitants)
84 Km N of Siena (53903 inhabitants)
85 Km SE of Modena (184973 inhabitants)
88 Km S of Ferrara (133155 inhabitants)
90 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
Bulletin
Rev1000
ML 1.3 2022-04-21
22:39:36
44.0505 11.5947 9 2022-07-08
12:34:02
Bollettino Sismico Italiano INGV 105870521
Reviewed
Rev100
ML 1.2 2022-04-21
22:39:36
44.049 11.5913 6 2022-04-21
22:45:01
Sala Sismica INGV-Roma 103587611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-04-21 22:39:36 ± 0.1
Latitude 44.0505 ± 0.0045
Longitude 11.5947 ± 0.0063
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 105870521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 364
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 336
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.08544
Epicentral distance of station farthest from the epicenter (degree) 0.30127
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 105870521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-06-11 01:11:06

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 103587611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-04-21 22:45:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOCL.EHZ. 2022-04-21T22:39:48.03 0.3 undecidable manual S 261 33.4443 50 -0.27 69
IV.BRIS.HHZ. 2022-04-21T22:39:45.90 0.6 undecidable manual S 35 23.6541 111 0.66 42
IV.RUFI.EHZ. 2022-04-21T22:39:45.46 0.6 undecidable manual S 196 24.5532 110 -0.06 49
IV.BOSL.HHZ. 2022-04-21T22:39:44.97 0.6 undecidable manual S 233 22.0668 112 0.26 47
IV.VISG.HHZ. 2022-04-21T22:39:44.01 0.6 undecidable manual S 320 19.9689 114 -0.05 49
IV.MOCL.EHZ. 2022-04-21T22:39:43.38 0.3 undecidable manual P 261 33.4443 50 0.08 72
IV.SEI.HHZ. 2022-04-21T22:39:43.59 0.6 undecidable manual S 271 18.87 115 -0.1 49
IV.RUFI.EHZ. 2022-04-21T22:39:41.74 0.1 undecidable manual P 196 24.5532 110 0.05 98
IV.BOSL.HHZ. 2022-04-21T22:39:41.42 0.1 undecidable manual P 233 22.0668 112 0.2 95
IV.BRIS.HHZ. 2022-04-21T22:39:41.68 0.3 undecidable manual P 35 23.6541 111 0.15 72
IV.SEI.HHZ. 2022-04-21T22:39:40.61 0.3 undecidable manual P 271 18.87 115 -0.03 74
IV.VISG.HHZ. 2022-04-21T22:39:40.71 0.1 negative manual P 320 19.9689 114 -0.14 97
IV.LMD.HHZ. 2022-04-21T22:39:40.66 0.1 undecidable manual S 72 9.4794 133 -0.32 95
IV.LMD.HHZ. 2022-04-21T22:39:39.00 0.1 positive manual P 72 9.4794 133 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.4 0.000329 0.16 AML other m 2022-04-21T22:39:40.91
IV.LMD.HHN. ML:1.5 0.00045650000000000004 0.36 AML other m 2022-04-21T22:39:40.91
IV.SEI.HHE. ML:1.4 0.0001835 0.32 AML other m 2022-04-21T22:39:43.80
IV.SEI.HHN. ML:1.5 0.0002565 1.76 AML other m 2022-04-21T22:39:44.89
IV.BOSL.HHE. ML:0.3 0.000013300000000000001 0.5 AML other m 2022-04-21T22:39:44.03
IV.BOSL.HHN. ML:0.5 0.0000207 0.36 AML other m 2022-04-21T22:39:45.38
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