Earthquake with magnitude of ML 1.3 on date 15-09-2021 and time 09:39:43 (UTC) in region 4 km N Civitella di Romagna (FC)

A magnitude ML 1.3 earthquake occured in region: 4 km N Civitella di Romagna (FC), on

  • 15-09-2021 09:39:43 (UTC)
  • 15-09-2021 11:39:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.043, 11.936 at 24 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
Civitella di Romagna FC 4 3786 3786
Galeata FC 5 2516 6302
Predappio FC 8 6346 12648
Rocca San Casciano FC 8 1910 14558
Dovadola FC 10 1653 16211
Santa Sofia FC 11 4136 20347
Portico e San Benedetto FC 12 756 21103
Meldola FC 14 9970 31073
Premilcuore FC 15 799 31872
Castrocaro Terme e Terra del Sole FC 15 6426 38298
Tredozio FC 16 1212 39510
Modigliana FC 17 4560 44070
Bertinoro FC 20 11059 55129

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Forlì (117913 inhabitants)
27 Km W of Cesena (96758 inhabitants)
27 Km S of Faenza (58541 inhabitants)
39 Km SE of Imola (69797 inhabitants)
47 Km SW of Ravenna (159116 inhabitants)
51 Km W of Rimini (147750 inhabitants)
62 Km E of Firenze (382808 inhabitants)
64 Km N of Arezzo (99543 inhabitants)
68 Km E of Scandicci (50609 inhabitants)
69 Km SE of Bologna (386663 inhabitants)
69 Km E of Prato (191150 inhabitants)
80 Km W of Pesaro (94582 inhabitants)
82 Km E of Pistoia (90315 inhabitants)
90 Km W of Fano (60888 inhabitants)
92 Km S of Ferrara (133155 inhabitants)
94 Km NE of Siena (53903 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 2021-09-15
09:39:43
44.0428 11.9358 24 2021-09-15
09:50:07
Sala Sismica INGV-Roma 95458421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-15 09:39:43 ± 0.33
Latitude 44.0428 ± 0.0081
Longitude 11.9358 ± 0.0238
Depth (km) 24 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95458421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1435
Semi-minor axis of confidence ellipse (meter) 1314
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) 1430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 212
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42358
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 95458421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-15 09:50:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.CLTB.HHZ. 2021-09-15T09:41:40.31 3.0 positive manual Pg 23.360001 0
IX.SNR3.EHZ.02 2021-09-15T09:41:34.18 3.0 undecidable manual Sn 3.65 0
GU.LSD.HHZ. 2021-09-15T09:41:30.86 3.0 undecidable manual Sn 8.82 0
IV.SERS.HHZ. 2021-09-15T09:41:28.72 3.0 undecidable manual Pg 17.219999 0
IV.EFIU.HHZ. 2021-09-15T09:41:26.60 3.0 undecidable manual Pn 7.11 0
IV.OVO.HHZ. 2021-09-15T09:41:23.44 3.0 undecidable manual Sn 2.57 0
IV.SGRT.HHZ. 2021-09-15T09:41:18.62 3.0 undecidable manual Sn -0.13 0
IV.VIVA.HHZ. 2021-09-15T09:40:56.38 3.0 undecidable manual Sg 7.64 0
IV.DGI.HHZ. 2021-09-15T09:40:49.03 3.0 undecidable manual Pn 5.16 0
IV.FIR.HHZ. 2021-09-15T09:40:04.73 3.0 undecidable manual S 0.26 0
IV.SEI.HHZ. 2021-09-15T09:39:59.97 3.0 undecidable manual S -0.05 0
IV.CRE.HHZ. 2021-09-15T09:39:59.68 0.3 undecidable manual S 178 0.4236 110 0.76 58
IV.RUFI.EHZ. 2021-09-15T09:39:57.82 0.6 undecidable manual S 236 0.3687 113 0.41 46
IV.ASQU.HHZ. 2021-09-15T09:39:54.77 0.6 undecidable manual S 203 0.268 123 0.01 50
IV.BRIS.HHZ. 2021-09-15T09:39:54.19 0.3 undecidable manual S 326 0.2185 129 0.62 66
IV.LMD.HHZ. 2021-09-15T09:39:52.33 0.6 undecidable manual S 282 0.1682 137 -0.15 49
IV.CRE.HHZ. 2021-09-15T09:39:52.07 0.1 undecidable manual P 178 0.4236 110 -0.24 95
IV.SFI.EHZ. 2021-09-15T09:39:51.99 0.6 undecidable manual S 205 0.152 141 -0.18 49
IV.RUFI.EHZ. 2021-09-15T09:39:51.33 1.0 negative manual P 236 0.3687 113 -0.11 24
IV.BRIS.HHZ. 2021-09-15T09:39:49.23 0.1 negative manual P 326 0.2185 129 0.01 100
IV.ASQU.HHZ. 2021-09-15T09:39:49.77 1.0 negative manual P 203 0.268 123 -0.14 25
IV.SFI.EHZ. 2021-09-15T09:39:48.04 0.3 positive manual P 205 0.152 141 -0.38 72
IV.LMD.HHZ. 2021-09-15T09:39:48.16 0.1 negative manual P 282 0.1682 137 -0.43 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:1.2 9.16E-5 0.28 AML other m 2021-09-15T09:39:52.19
IV.SFI.EHN. ML:1.2 8.305E-5 0.26 AML other m 2021-09-15T09:39:52.36
IV.LMD.HHE. ML:1.7 0.0002615 0.18 AML other m 2021-09-15T09:39:52.57
IV.LMD.HHN. ML:1.6 0.000205 0.16 AML other m 2021-09-15T09:39:52.57
IV.BRIS.HHE. ML:1.4 0.00010215 0.98 AML other m 2021-09-15T09:39:54.98
IV.BRIS.HHN. ML:1.4 0.000117 0.56 AML other m 2021-09-15T09:39:54.65
IV.ASQU.HHN. ML:1 3.815E-5 0.36 AML other m 2021-09-15T09:39:55.54
IV.ASQU.HHE. ML:1.1 4.29E-5 0.64 AML other m 2021-09-15T09:39:55.99
IV.SEI.HHE. ML:1.3 5.315E-5 0.48 AML other m 2021-09-15T09:39:59.97
IV.CRE.HHE. ML:1 2.46E-5 1.72 AML other m 2021-09-15T09:40:00.00
IV.SEI.HHN. ML:1.4 6.545E-5 0.74 AML other m 2021-09-15T09:40:00.73
IV.CRE.HHN. ML:1.1 2.92E-5 0.62 AML other m 2021-09-15T09:40:02.30
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