Earthquake with magnitude of ML 1.8 on date 02-04-2020 and time 17:36:59 (UTC) in region 4 km S Rocca San Casciano (FC)

A magnitude ML 1.8 earthquake occured in region: 4 km S Rocca San Casciano (FC), on

  • 02-04-2020 17:36:59 (UTC)
  • 02-04-2020 19:36:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.03, 11.84 at 28 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
Rocca San Casciano FC 4 1910 1910
Portico e San Benedetto FC 4 756 2666
Galeata FC 7 2516 5182
Premilcuore FC 7 799 5981
Civitella di Romagna FC 9 3786 9767
Tredozio FC 9 1212 10979
Santa Sofia FC 11 4136 15115
Dovadola FC 12 1653 16768
Predappio FC 15 6346 23114
Modigliana FC 15 4560 27674
Marradi FI 19 3139 30813
Castrocaro Terme e Terra del Sole FC 19 6426 37239

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Forlì (117913 inhabitants)
29 Km S of Faenza (58541 inhabitants)
35 Km W of Cesena (96758 inhabitants)
38 Km S of Imola (69797 inhabitants)
53 Km SW of Ravenna (159116 inhabitants)
54 Km NE of Firenze (382808 inhabitants)
59 Km W of Rimini (147750 inhabitants)
60 Km E of Scandicci (50609 inhabitants)
61 Km E of Prato (191150 inhabitants)
62 Km N of Arezzo (99543 inhabitants)
65 Km SE of Bologna (386663 inhabitants)
74 Km E of Pistoia (90315 inhabitants)
87 Km W of Pesaro (94582 inhabitants)
88 Km NE of Siena (53903 inhabitants)
92 Km S of Ferrara (133155 inhabitants)
97 Km W of Fano (60888 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 2020-04-02
17:36:59
44.03 11.83 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 17:36:59 ± 0.19
Latitude 44.03 ± 0.01
Longitude 11.83 ± 0.01
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77795461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 688
Semi-minor axis of confidence ellipse (meter) 286
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34354
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 8
Magnitude information

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 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.VISG.HHE. 2020-04-02T17:37:13.56 0.3 undecidable manual S 300 0.3301 122 0.14 71
IV.SEI.HHZ. 2020-04-02T17:37:13.77 0.6 undecidable manual S 275 0.3435 121 0.03 49
IV.ASQU.HHE. 2020-04-02T17:37:11.25 0.3 undecidable manual S 188 0.2311 134 0.16 73
IV.BRIS.HHZ. 2020-04-02T17:37:11.18 1.0 undecidable manual S 346 0.205 137 0.64 21
IV.RINC.HHE. 2020-04-02T17:37:10.56 0.6 undecidable manual S 230 0.2149 136 -0.19 48
IV.SFI.EHZ. 2020-04-02T17:37:09.15 0.6 undecidable manual S 176 0.1214 152 0.05 51
IV.LMD.HHZ. 2020-04-02T17:37:08.60 0.6 undecidable manual S 300 0.1052 155 -0.29 48
IV.SEI.HHZ. 2020-04-02T17:37:08.00 0.1 undecidable manual P 275 0.3435 121 0.17 95
IV.VISG.HHE. 2020-04-02T17:37:07.54 0.1 undecidable manual P 300 0.3301 122 -0.1 96
IV.BRSN.EHZ. 2020-04-02T17:37:07.52 1.0 positive manual P 34 0.313 124 0.13 24
IV.RUFI.EHZ. 2020-04-02T17:37:06.99 3.0 undecidable manual P 0
IV.ASQU.HHE. 2020-04-02T17:37:06.36 0.1 undecidable manual P 188 0.2311 134 0.06 99
IV.RINC.HHE. 2020-04-02T17:37:06.01 0.1 undecidable manual P 230 0.2149 136 -0.09 98
IV.RIBO.EHZ.01 2020-04-02T17:37:05.33 3.0 negative manual P -0.05 0
IV.BRIS.HHZ. 2020-04-02T17:37:05.95 0.1 undecidable manual P 346 0.205 137 -0.03 100
IV.SFI.EHZ. 2020-04-02T17:37:05.10 1.0 positive manual P 176 0.1214 152 -0.05 25
IV.LMD.HHZ. 2020-04-02T17:37:04.61 0.3 positive manual P 300 0.1052 155 -0.42 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:1.3 0.000105 1.54 AML other m 2020-04-02T17:37:09.12
IV.LMD.HHE. ML:1.2 6.935E-5 1.42 AML other m 2020-04-02T17:37:09.13
IV.BRSN.HNN. ML:2.5 0.001028 0.6 AML other m 2020-04-02T17:37:11.61
IV.BRSN.EHN. ML:2.5 0.001052 0.2 AML other m 2020-04-02T17:37:11.61
IV.BRSN.EHE. ML:2.6 0.001145 0.06 AML other m 2020-04-02T17:37:13.46
IV.BRSN.HNE. ML:2.6 0.00117 0.06 AML other m 2020-04-02T17:37:13.46
IV.SFI.EHE. ML:0.9 3.69392E-5 1.1008 AML other m 2020-04-02T17:37:09.55
IV.SFI.EHN. ML:0.8 3.213205E-5 11.1232 AML other m 2020-04-02T17:37:09.51
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