Earthquake with magnitude of ML 1.9 on date 30-09-2021 and time 11:31:35 (UTC) in region 8 km NE Forlimpopoli (FC)

A magnitude ML 1.9 earthquake occured in region: 8 km NE Forlimpopoli (FC), on

  • 30-09-2021 11:31:35 (UTC)
  • 30-09-2021 13:31:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.24, 12.204 at 30 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
Forlimpopoli FC 8 13290 13290
Bertinoro FC 11 11059 24349
Cesena FC 12 96758 121107
Cervia RA 12 28940 150047
Forlì FC 13 117913 267960
Cesenatico FC 16 25796 293756
Meldola FC 17 9970 303726
Gambettola FC 17 10660 314386
Montiano FC 19 1716 316102
Ravenna RA 20 159116 475218

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km N of Cesena (96758 inhabitants)
13 Km E of Forlì (117913 inhabitants)
20 Km S of Ravenna (159116 inhabitants)
26 Km E of Faenza (58541 inhabitants)
35 Km NW of Rimini (147750 inhabitants)
41 Km E of Imola (69797 inhabitants)
68 Km NW of Pesaro (94582 inhabitants)
74 Km E of Bologna (386663 inhabitants)
79 Km NW of Fano (60888 inhabitants)
81 Km SE of Ferrara (133155 inhabitants)
90 Km NE of Arezzo (99543 inhabitants)
92 Km NE of Firenze (382808 inhabitants)
97 Km E of Prato (191150 inhabitants)
98 Km NE of Scandicci (50609 inhabitants)
98 Km SE of Rovigo (51867 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 1.9 2021-09-30
11:31:35
44.2398 12.2037 30 2021-09-30
11:43:00
Sala Sismica INGV-Roma 96062591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-30 11:31:35 ± 0.71
Latitude 44.2398 ± 0.0306
Longitude 12.2037 ± 0.0402
Depth (km) 30 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96062591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3138
Semi-minor axis of confidence ellipse (meter) 3092
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 3140
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 232
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 44
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 96062591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-30 11:43:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.PDG.HHZ. 2021-09-30T11:32:43.77 3.0 undecidable manual Pg 20.870001 0
MN.BNI.HHZ. 2021-09-30T11:32:37.61 3.0 undecidable manual Sn 10.24 0
IX.SCL3.EHZ.02 2021-09-30T11:32:36.17 3.0 undecidable manual Sn -9.99 0
IV.MILZ.HHZ. 2021-09-30T11:32:35.04 3.0 positive manual Pg 16.42 0
IV.VITU.HHZ. 2021-09-30T11:32:35.28 3.0 undecidable manual Sg 7.49 0
IV.RESU.HHZ. 2021-09-30T11:32:33.35 3.0 undecidable manual Pg 13.22 0
IX.MNT3.EHZ.02 2021-09-30T11:32:32.33 3.0 undecidable manual Sn -5.68 0
IV.VBKN.HHZ. 2021-09-30T11:32:26.80 3.0 undecidable manual Sn -3.49 0
IV.SERS.HHZ. 2021-09-30T11:32:23.30 3.0 positive manual Pn 2.93 0
MN.TRI.HHZ. 2021-09-30T11:32:23.97 3.0 undecidable manual Sn 1.14 0
CR.STON.BHZ. 2021-09-30T11:32:21.26 3.0 undecidable manual Pg 14.65 0
IV.MCEL.HHZ. 2021-09-30T11:32:17.61 3.0 negative manual Pg 15.73 0
IV.ZEN8.EHZ. 2021-09-30T11:32:16.75 3.0 undecidable manual Sg 13.38 0
IV.SCHR.EHZ. 2021-09-30T11:32:16.28 3.0 positive manual Pg 11.16 0
IV.MTSN.HHZ. 2021-09-30T11:32:12.22 3.0 undecidable manual Pg 10.24 0
SL.KOGS.BHZ. 2021-09-30T11:32:08.02 3.0 undecidable manual Pn 1.71 0
IV.VVLD.HHZ. 2021-09-30T11:32:06.27 3.0 undecidable manual Sg 1.62 0
IV.ERC.EHZ. 2021-09-30T11:32:03.29 3.0 undecidable manual Pn -6.76 0
IV.TREG.HNZ. 2021-09-30T11:32:03.24 3.0 undecidable manual Sn 2.04 0
IV.SARZ.HHZ. 2021-09-30T11:31:57.12 3.0 undecidable manual Sn 0.12 0
IV.SACR.HHZ. 2021-09-30T11:31:57.53 3.0 undecidable manual Pg 12.94 0
IV.LMD.HHZ. 2021-09-30T11:31:51.44 0.6 undecidable manual S 246 0.3912 119 0.5 43
IV.SFI.EHZ. 2021-09-30T11:31:51.40 0.3 undecidable manual S 218 0.4218 117 -0.34 71
IV.MPAG.EHZ. 2021-09-30T11:31:50.87 3.0 undecidable manual Sg 6.92 0
IV.SNTG.HHZ. 2021-09-30T11:31:50.46 3.0 undecidable manual Sg 5.01 0
GU.RNCA.HHZ. 2021-09-30T11:31:50.89 3.0 undecidable manual Sn 0.35 0
IV.PIEI.HHZ. 2021-09-30T11:31:50.34 3.0 undecidable manual Sg 9.79 0
IV.BRIS.HHZ. 2021-09-30T11:31:49.55 0.6 undecidable manual S 267 0.313 126 0.55 44
IV.PE3.EHZ. 2021-09-30T11:31:47.06 3.0 undecidable manual Sg 6.12 0
IV.CPGN.EHZ. 2021-09-30T11:31:45.95 0.1 undecidable manual P 169 0.4461 116 0.67 80
IV.SFI.EHZ. 2021-09-30T11:31:44.22 0.1 undecidable manual P 218 0.4218 117 -0.68 85
IV.LMD.HHZ. 2021-09-30T11:31:44.06 0.1 undecidable manual P 246 0.3912 119 -0.38 92
IV.BRSN.EHZ. 2021-09-30T11:31:44.84 0.1 undecidable manual S 297 0.0989 158 -0.11 100
IX.RSF3.HHZ.02 2021-09-30T11:31:44.27 3.0 undecidable manual Pn -7.39 0
IV.BRIS.HHZ. 2021-09-30T11:31:43.65 0.1 undecidable manual P 267 0.313 126 0.34 93
GU.POPM.HHZ. 2021-09-30T11:31:41.04 3.0 undecidable manual Sg 8.28 0
IV.BRSN.EHZ. 2021-09-30T11:31:40.80 0.1 undecidable manual P 297 0.0989 158 -0.17 99
IT.PLTA.HNZ. 2021-09-30T11:31:40.40 3.0 undecidable manual Pn -1.79 0
IV.ATMI.HHZ. 2021-09-30T11:31:37.42 3.0 undecidable manual Sg 0.8 0
IV.PCN.HNZ. 2021-09-30T11:31:32.82 3.0 negative manual Pg 6.43 0
FR.AJAC.HHZ.00 2021-09-30T11:31:26.30 3.0 positive manual Pn 0.1 0
IV.NDIM.HNZ. 2021-09-30T11:31:23.87 3.0 negative manual Pn 0.92 0
IV.ARVD.HHZ. 2021-09-30T11:31:20.16 3.0 positive manual P -1.89 0
IV.MURB.HNZ. 2021-09-30T11:31:19.10 3.0 undecidable manual Pn 0.51 0
IV.NARO.HHZ. 2021-09-30T11:31:19.41 3.0 negative manual Pn -0.17 0
IV.IMOL.HNZ. 2021-09-30T11:31:19.20 3.0 positive manual Pn -0.11 0
IT.RMMM.HGZ. 2021-09-30T11:31:19.89 3.0 positive manual P -4.16 0
IV.RIBO.EHZ.01 2021-09-30T11:31:10.00 3.0 positive manual Pn -1.66 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NDIM.HHN. ML:3 0.0007865 0.1 AML other m 2021-09-30T11:31:30.23
IV.NDIM.HHE. ML:3.7 0.003185 0.08 AML other m 2021-09-30T11:31:30.23
IV.NDIM.HNE. ML:3.7 0.00342 0.08 AML other m 2021-09-30T11:31:30.23
IV.NDIM.HNN. ML:3.3 0.0012945 0.1 AML other m 2021-09-30T11:31:30.24
IV.LMD.HHE. ML:2.1 0.0002975 0.18 AML other m 2021-09-30T11:31:51.79
IV.LMD.HHN. ML:2 0.000278 1.82 AML other m 2021-09-30T11:31:52.99
IV.SFI.EHN. ML:1.8 0.0001485 1.4 AML other m 2021-09-30T11:31:52.19
IV.SFI.EHE. ML:1.8 0.0001605 0.52 AML other m 2021-09-30T11:31:52.52
IV.CPGN.EHN. ML:1.8 0.0001525 1.08 AML other m 2021-09-30T11:31:56.08
IV.CPGN.EHE. ML:1.9 0.0001805 0.42 AML other m 2021-09-30T11:32:01.47
IV.PIEI.HHN. ML:1.5 3.9E-5 0.6 AML other m 2021-09-30T11:32:03.56
IV.PIEI.HHE. ML:1.6 5.545E-5 0.34 AML other m 2021-09-30T11:32:03.72
IV.MPAG.EHN. ML:1.9 9.165E-5 0.42 AML other m 2021-09-30T11:32:04.54
IV.TREG.EHE. ML:2.6 0.000148 0.3 AML other m 2021-09-30T11:32:09.82
IV.TREG.EHN. ML:2.6 0.0001575 0.66 AML other m 2021-09-30T11:32:09.50
IV.MPAG.EHE. ML:1.8 7.44E-5 0.42 AML other m 2021-09-30T11:32:11.67
IX.RSF3.HHN.02 ML:3.7 0.0002105 0.6 AML other m 2021-09-30T11:32:25.33
IX.RSF3.HHE.02 ML:3.6 0.0001935 0.9 AML other m 2021-09-30T11:32:29.16
IV.VBKN.HHE. ML:4.6 0.001895 0.86 AML other m 2021-09-30T11:32:42.37
IV.VBKN.HHN. ML:4.5 0.001575 0.98 AML other m 2021-09-30T11:33:06.09
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