Earthquake with magnitude of ML 1.3 on date 08-11-2021 and time 23:36:11 (UTC) in region 3 km SW Portico e San Benedetto (FC)

A magnitude ML 1.3 earthquake occured in region: 3 km SW Portico e San Benedetto (FC), on

  • 08-11-2021 23:36:11 (UTC)
  • 09-11-2021 00:36:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.006, 11.755 at 7 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
Portico e San Benedetto FC 3 756 756
Premilcuore FC 4 799 1555
Tredozio FC 8 1212 2767
Rocca San Casciano FC 9 1910 4677
Galeata FC 13 2516 7193
Marradi FI 14 3139 10332
Santa Sofia FC 14 4136 14468
San Godenzo FI 14 1167 15635
Civitella di Romagna FC 15 3786 19421
Dovadola FC 17 1653 21074
Modigliana FC 17 4560 25634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Faenza (58541 inhabitants)
33 Km SW of Forlì (117913 inhabitants)
39 Km S of Imola (69797 inhabitants)
42 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
54 Km NE of Scandicci (50609 inhabitants)
54 Km E of Prato (191150 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
61 Km N of Arezzo (99543 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
65 Km W of Rimini (147750 inhabitants)
68 Km E of Pistoia (90315 inhabitants)
84 Km NE of Siena (53903 inhabitants)
93 Km S of Ferrara (133155 inhabitants)
93 Km W of Pesaro (94582 inhabitants)
97 Km SE of Modena (184973 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.3 2021-11-08
23:36:11
44.0063 11.7553 7 2021-11-08
23:45:38
Sala Sismica INGV-Roma 97349301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-08 23:36:11 ± 0.14
Latitude 44.0063 ± 0.0027
Longitude 11.7553 ± 0.0050
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97349301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 426
Semi-minor axis of confidence ellipse (meter) 173
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
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) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07914
Epicentral distance of station farthest from the epicenter (degree) 0.29408
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 97349301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-08 23:45:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VISG.HHZ. 2021-11-08T23:36:22.98 0.3 undecidable manual S 309 0.2941 102 0.08 72
IV.SEI.HHZ. 2021-11-08T23:36:22.86 0.3 undecidable manual S 280 0.2887 103 0.15 71
IV.RUFI.EHZ. 2021-11-08T23:36:21.24 0.3 undecidable manual S 227 0.2437 105 0.21 71
IV.BRIS.HHZ. 2021-11-08T23:36:20.51 0.3 undecidable manual S 2 0.2185 106 0.44 68
IV.ASQU.HHE. 2021-11-08T23:36:19.87 0.3 undecidable manual S 173 0.2104 107 0.07 74
IV.VISG.HHZ. 2021-11-08T23:36:17.68 0.1 undecidable manual P 309 0.2941 102 -0.32 92
IV.SEI.HHZ. 2021-11-08T23:36:17.73 0.1 undecidable manual P 280 0.2887 103 -0.17 95
IV.BRIS.HHZ. 2021-11-08T23:36:16.42 0.1 undecidable manual P 2 0.2185 106 0.06 98
IV.ASQU.HHE. 2021-11-08T23:36:16.19 0.1 undecidable manual P 173 0.2104 107 -0.02 99
IV.RUFI.EHZ. 2021-11-08T23:36:16.97 0.1 undecidable manual P 227 0.2437 105 0.05 98
IV.SFI.EHZ. 2021-11-08T23:36:16.58 0.3 undecidable manual S 147 0.1214 118 0 76
IV.LMD.HHE. 2021-11-08T23:36:15.10 0.3 undecidable manual S 334 0.0791 129 -0.13 75
IV.SFI.EHZ. 2021-11-08T23:36:14.29 0.1 undecidable manual P 147 0.1214 118 -0.06 100
IV.LMD.HHE. 2021-11-08T23:36:13.44 0.1 undecidable manual P 334 0.0791 129 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:1.2 0.000192 0.16 AML other m 2021-11-08T23:36:16.88
IV.SFI.EHN. ML:1.2 0.000202 0.16 AML other m 2021-11-08T23:36:16.97
IV.BRIS.HHE. ML:1.5 0.00021095 1.12 AML other m 2021-11-08T23:36:20.89
IV.BRIS.HHN. ML:1.8 0.0004055 0.22 AML other m 2021-11-08T23:36:20.98
IV.SEI.HHN. ML:2.1 0.000645 1.7 AML other m 2021-11-08T23:36:24.02
IV.SEI.HHE. ML:1.6 0.000201 0.5 AML other m 2021-11-08T23:36:25.54
IV.SFI.HNE. ML:1.2 0.00017716105 0.1536 AML other m 2021-11-08T23:36:16.79
IV.SFI.HNN. ML:1.2 0.0002030097 0.1664 AML other m 2021-11-08T23:36:16.88
IV.RUFI.EHE. ML:0.6 2.350846E-5 0.128 AML other m 2021-11-08T23:36:21.77
IV.RUFI.EHN. ML:1.1 6.635071E-5 0.2688 AML other m 2021-11-08T23:36:21.98
IV.VISG.HHE. ML:0.8 3.040835E-5 0.2432 AML other m 2021-11-08T23:36:24.18
IV.VISG.HHN. ML:1.1 5.4766995E-5 0.1408 AML other m 2021-11-08T23:36:24.09
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