Earthquake with magnitude of ML 0.9 on date 30-10-2019 and time 01:37:38 (UTC) in region 6 km NE Marradi (FI)

A magnitude ML 0.9 earthquake occured in region: 6 km NE Marradi (FI), on

  • 30-10-2019 01:37:38 (UTC)
  • 30-10-2019 02:37:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.12, 11.64 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 6 3139 3139
Palazzuolo sul Senio FI 8 1154 4293
Tredozio FC 10 1212 5505
Casola Valsenio RA 11 2617 8122
Modigliana FC 13 4560 12682
Castel del Rio BO 15 1246 13928
Brisighella RA 15 7639 21567
Portico e San Benedetto FC 16 756 22323
Fontanelice BO 16 1943 24266
Rocca San Casciano FC 17 1910 26176
Borgo Tossignano BO 18 3288 29464
Riolo Terme RA 18 5720 35184
Casalfiumanese BO 19 3438 38622
Dovadola FC 20 1653 40275
Premilcuore FC 20 799 41074

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km S of Imola (69797 inhabitants)
26 Km SW of Faenza (58541 inhabitants)
34 Km W of Forlì (117913 inhabitants)
48 Km SE of Bologna (386663 inhabitants)
48 Km W of Cesena (96758 inhabitants)
50 Km NE of Firenze (382808 inhabitants)
51 Km NE of Prato (191150 inhabitants)
55 Km NE of Scandicci (50609 inhabitants)
55 Km SW of Ravenna (159116 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
74 Km W of Rimini (147750 inhabitants)
76 Km N of Arezzo (99543 inhabitants)
79 Km S of Ferrara (133155 inhabitants)
81 Km SE of Modena (184973 inhabitants)
93 Km N of Siena (53903 inhabitants)
95 Km SE of Carpi (70699 inhabitants)
96 Km E of Lucca (89046 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 0.9 2019-10-30
01:37:38
44.12 11.64 8 2019-10-30
01:49:13
Sala Sismica INGV-Roma 73527301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-30 01:37:38 ± 0.08
Latitude 44.12 ± 0.00
Longitude 11.64 ± 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 73527301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 415
Semi-minor axis of confidence ellipse (meter) 392
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.06655
Epicentral distance of station farthest from the epicenter (degree) 0.37502
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 73527301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-30 01:49:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FNVD.HHE. 2019-10-30T01:37:52.49 0.6 undecidable manual S 277 0.375 50 0.12 46
IV.SFI.EHZ. 2019-10-30T01:37:48.85 0.6 undecidable manual S 146 0.2644 106 0.06 48
IV.SEI.HHZ. 2019-10-30T01:37:47.09 0.6 undecidable manual S 251 0.2158 109 0.09 48
IV.FNVD.HHE. 2019-10-30T01:37:46.54 0.3 undecidable manual P 277 0.375 50 0.16 69
IV.SFI.EHZ. 2019-10-30T01:37:44.08 0.3 undecidable manual P 146 0.2644 106 -0.23 69
IV.BRIS.HHZ. 2019-10-30T01:37:44.19 0.3 undecidable manual S 42 0.1331 119 0.09 73
IV.SEI.HHZ. 2019-10-30T01:37:43.09 0.1 undecidable manual P 251 0.2158 109 -0.19 94
IV.LMD.HHZ. 2019-10-30T01:37:42.26 0.3 undecidable manual S 136 0.0665 139 0.2 72
IV.BRIS.HHZ. 2019-10-30T01:37:41.47 0.1 positive manual P 42 0.1331 119 -0.13 97
IV.LMD.HHZ. 2019-10-30T01:37:40.45 0.1 undecidable manual P 136 0.0665 139 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0.8 0.000122 0.34 AML other m 2019-10-30T01:37:42.34
IV.LMD.HHN. ML:0.8 0.0001044 0.26 AML other m 2019-10-30T01:37:42.52
IV.BRIS.HHE. ML:1.1 0.0001415 0.34 AML other m 2019-10-30T01:37:44.39
IV.BRIS.HHN. ML:1 9.61E-5 0.48 AML other m 2019-10-30T01:37:45.03
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