Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 02-04-2020 and time 19:37:00 (Italy) in region 3 km S Rocca San Casciano (FC)

A magnitude ML 1.1 earthquake occured in region: 3 km S Rocca San Casciano (FC), on

  • 02-04-2020 17:37:00 (UTC)
  • 02-04-2020 19:37:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0340, 11.8330 at 26 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.

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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
Rocca San Casciano FC 3 1910 1910
Portico e San Benedetto FC 4 756 2666
Galeata FC 8 2516 5182
Premilcuore FC 8 799 5981
Tredozio FC 9 1212 7193
Civitella di Romagna FC 9 3786 10979
Dovadola FC 11 1653 12632
Santa Sofia FC 11 4136 16768
Modigliana FC 14 4560 21328
Predappio FC 14 6346 27674
Marradi FI 18 3139 30813
Castrocaro Terme e Terra del Sole FC 19 6426 37239

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Forlì (117913 inhabitants)
28 Km S of Faenza (58541 inhabitants)
35 Km W of Cesena (96758 inhabitants)
37 Km S of Imola (69797 inhabitants)
52 Km SW of Ravenna (159116 inhabitants)
55 Km NE of Firenze (382808 inhabitants)
59 Km W of Rimini (147750 inhabitants)
61 Km NE of Scandicci (50609 inhabitants)
61 Km E of Prato (191150 inhabitants)
63 Km N of Arezzo (99543 inhabitants)
65 Km SE of Bologna (386663 inhabitants)
74 Km E of Pistoia (90315 inhabitants)
88 Km W of Pesaro (94582 inhabitants)
89 Km NE of Siena (53903 inhabitants)
91 Km S of Ferrara (133155 inhabitants)
97 Km W of Fano (60888 inhabitants)
99 Km SE of Modena (184973 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 1.1 2020-04-02
17:37:00		 44.034 11.8333 26 2020-07-18
21:08:41		 Bollettino Sismico Italiano INGV 80367831
Reviewed
Rev100 		ML 1.8 2020-04-02
17:36:59		 44.0257 11.8347 28 2020-04-02
17:48:52		 Sala Sismica INGV-Roma 77795461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-02 17:37:00 ± 0.21
Latitude 44.0340 ± 0.0072
Longitude 11.8333 ± 0.0125
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80367831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1149
Semi-minor axis of confidence ellipse (meter) 214
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42358
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 80367831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-21 08:14:58

ML:1.8

Field Value
Value 1.8
Uncertainty 0.8
Num. used stations 8
Type of magnitude ML
Reference to an origin 77795461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-02 17:48:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-04-02T17:38:17.30 3.0 undecidable manual Sn 16.450001 0
IV.EUCT.HNZ. 2020-04-02T17:37:56.86 3.0 undecidable manual Sg 0.02 0
GU.CANO.HHZ. 2020-04-02T17:37:48.81 3.0 undecidable manual Sn -9.42 0
IV.MNTT.EHZ. 2020-04-02T17:37:16.66 3.0 positive manual Pn 5.22 0
IV.CRE.HHE. 2020-04-02T17:37:16.68 0.6 undecidable manual S 168 47.0196 113 0.81 40
IV.VISG.HHE. 2020-04-02T17:37:13.56 0.3 undecidable manual S 299 36.1416 120 0.29 73
IV.SEI.HHZ. 2020-04-02T17:37:13.77 0.6 undecidable manual S 274 37.9287 119 0.09 50
IV.BRIS.HHZ. 2020-04-02T17:37:11.18 1.0 undecidable manual S 346 21.7671 136 0.95 20
IV.ASQU.HHE. 2020-04-02T17:37:11.25 0.3 undecidable manual S 188 26.5512 130 0.09 78
IV.RINC.HHE. 2020-04-02T17:37:10.56 0.6 undecidable manual S 228 24.3534 132 -0.17 51
IV.SFI.EHZ. 2020-04-02T17:37:09.15 0.6 undecidable manual S 176 14.3745 148 0.14 53
IV.CRE.HHE. 2020-04-02T17:37:09.28 0.3 undecidable manual P 168 47.0196 113 0.12 74
IV.LMD.HHZ. 2020-04-02T17:37:08.60 0.6 undecidable manual S 296 11.1777 155 0 54
IV.SEI.HHZ. 2020-04-02T17:37:08.00 0.3 undecidable manual P 274 37.9287 119 0.1 75
IV.BRSN.EHZ. 2020-04-02T17:37:07.52 1.0 positive manual P 35 34.0437 122 0.14 25
IV.VISG.HHE. 2020-04-02T17:37:07.54 0.3 undecidable manual P 299 36.1416 120 -0.12 76
IV.ASQU.HHE. 2020-04-02T17:37:06.34 0.3 undecidable manual P 188 26.5512 130 -0.11 77
IV.RUFI.EHZ. 2020-04-02T17:37:06.97 0.3 undecidable manual P 230 33.8439 122 -0.39 72
IV.BRIS.HHZ. 2020-04-02T17:37:06.01 0.3 undecidable manual P 346 21.7671 136 0.1 78
IV.RINC.HHE. 2020-04-02T17:37:06.01 0.3 undecidable manual P 228 24.3534 132 -0.19 76
IV.RIBO.EHZ.01 2020-04-02T17:37:05.33 3.0 negative manual P -0.05 0
IV.SFI.EHZ. 2020-04-02T17:37:05.05 0.3 undecidable manual P 176 14.3745 148 -0.15 78
IV.LMD.HHZ. 2020-04-02T17:37:04.61 0.1 positive manual P 296 11.1777 155 -0.36 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.0 0.00005263745 0.1792 AML other m 2020-04-02T17:37:09.14
IV.LMD.HHN. ML:1.2 0.000078456475 0.1536 AML other m 2020-04-02T17:37:09.13
IV.SFI.EHN. ML:0.8 0.000028398355 0.2944 AML other m 2020-04-02T17:37:10.10
IV.SFI.HNE. ML:1.3 0.00010067360999999999 0.4992 AML other m 2020-04-02T17:37:18.78
IV.SFI.EHE. ML:0.8 0.000034093745000000005 0.2816 AML other m 2020-04-02T17:37:09.55
IV.SFI.HNN. ML:1.4 0.00011833530999999999 0.704 AML other m 2020-04-02T17:37:04.58
IV.RIBO.EHE.01 ML:1.7 0.000029987025 0.0768 AML other m 2020-04-02T17:37:18.44
IV.BRIS.HNN. ML:1.8 0.00028854265000000004 0.7552 AML other m 2020-04-02T17:37:05.19
IV.BRIS.HNE. ML:1.3 0.000097344805 1.2416 AML other m 2020-04-02T17:37:20.86
IV.BRIS.HHE. ML:0.9 0.00003698495 0.1408 AML other m 2020-04-02T17:37:12.19
IV.BRIS.HHN. ML:1.0 0.000047181440000000005 0.4224 AML other m 2020-04-02T17:37:13.27
IV.RUFI.EHE. ML:0.5 0.0000108342205 0.64 AML other m 2020-04-02T17:37:13.15
IV.RUFI.EHN. ML:0.9 0.000024375069999999998 2.0864 AML other m 2020-04-02T17:37:19.32
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