Earthquake with magnitude of ML 1.1 on date 07-09-2021 and time 07:04:27 (Italy) in region 2 km S Alto Reno Terme (BO)

A magnitude ML 1.1 earthquake occured in region: 2 km S Alto Reno Terme (BO), on

  • 07-09-2021 05:04:27 (UTC)
  • 07-09-2021 07:04:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.142, 10.98 at 9 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
Alto Reno Terme BO 2 6960 6960
Sambuca Pistoiese PT 4 1626 8586
Castel di Casio BO 5 3448 12034
Lizzano in Belvedere BO 7 2212 14246
Gaggio Montano BO 7 4878 19124
Camugnano BO 9 1885 21009
Castiglione dei Pepoli BO 14 5648 26657
Montese MO 14 3353 30010
Castel d'Aiano BO 16 1906 31916
Cantagallo PO 16 3105 35021
Fanano MO 16 2989 38010
Vernio PO 17 6060 44070
San Marcello Pistoiese PT 18 6416 50486
Cutigliano PT 18 1488 51974
Grizzana Morandi BO 19 3916 55890
Vergato BO 19 7639 63529
Sestola MO 19 2508 66037

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of Pistoia (90315 inhabitants)
31 Km NW of Prato (191150 inhabitants)
46 Km NW of Scandicci (50609 inhabitants)
47 Km NW of Firenze (382808 inhabitants)
49 Km SW of Bologna (386663 inhabitants)
51 Km NE of Lucca (89046 inhabitants)
56 Km S of Modena (184973 inhabitants)
63 Km W of Imola (69797 inhabitants)
66 Km E of Viareggio (62467 inhabitants)
66 Km NE of Pisa (89158 inhabitants)
68 Km SE of Reggio nell'Emilia (171345 inhabitants)
68 Km E of Massa (69479 inhabitants)
71 Km E of Carrara (63133 inhabitants)
72 Km S of Carpi (70699 inhabitants)
74 Km W of Faenza (58541 inhabitants)
85 Km NE of Livorno (159219 inhabitants)
85 Km W of Forlì (117913 inhabitants)
90 Km SE of Parma (192836 inhabitants)
92 Km E of La Spezia (93959 inhabitants)
92 Km SW of Ferrara (133155 inhabitants)
96 Km NW 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 1.1 2021-09-07
05:04:27
44.142 10.9802 9 2021-09-07
05:09:44
Sala Sismica INGV-Roma 95138111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-07 05:04:27 ± 0.18
Latitude 44.1420 ± 0.0126
Longitude 10.9802 ± 0.0201
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95138111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1640
Semi-minor axis of confidence ellipse (meter) 1138
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 57
Circular confidence region, given by single value of horizontal uncertainty (meter) 1640
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.48
Epicentral distance of station closest to the epicenter (degree) 0.10522
Epicentral distance of station farthest from the epicenter (degree) 0.41908
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 95138111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-07 05:09:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CARD.HHZ. 2021-09-07T05:04:40.85 0.6 undecidable manual S 252 0.3759 50 -0.86 39
IV.ZCCA.HHZ. 2021-09-07T05:04:36.02 0.6 undecidable manual S 359 0.2086 112 -0.34 48
IV.CRMI.HHZ. 2021-09-07T05:04:36.10 0.1 undecidable manual P 180 0.3462 50 0.82 79
GU.MAIM.HHZ. 2021-09-07T05:04:36.65 0.1 undecidable manual P 237 0.4191 50 0.12 96
GU.CARD.HHZ. 2021-09-07T05:04:36.33 0.1 undecidable manual P 252 0.3759 50 0.54 88
IV.MOCL.EHZ. 2021-09-07T05:04:35.76 0.6 undecidable manual S 133 0.1988 113 -0.24 49
IV.BOSL.HHZ. 2021-09-07T05:04:35.16 0.1 undecidable manual P 127 0.3534 50 -0.24 95
IV.FNVD.HHZ. 2021-09-07T05:04:34.31 0.6 undecidable manual S 76 0.1052 128 1.43 31
IV.SEI.HHZ. 2021-09-07T05:04:33.98 0.1 negative manual P 108 0.2851 50 -0.26 96
IV.MOCL.EHZ. 2021-09-07T05:04:32.31 0.1 undecidable manual P 133 0.1988 113 -0.19 99
IV.MPPT.EHZ. 2021-09-07T05:04:32.08 0.1 undecidable manual P 157 0.2005 112 -0.45 93
IV.ZCCA.HHZ. 2021-09-07T05:04:32.51 0.1 undecidable manual P 359 0.2086 112 -0.19 99
IV.FNVD.HHZ. 2021-09-07T05:04:30.91 0.1 undecidable manual P 76 0.1052 128 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ZCCA.HHN. ML:1 6.005E-5 0.4 AML other m 2021-09-07T05:04:36.32
IV.FNVD.HHE. ML:1 0.000123 0.64 AML other m 2021-09-07T05:04:37.40
IV.FNVD.HHN. ML:1.1 0.000164 0.62 AML other m 2021-09-07T05:04:38.77
IV.MPPT.EHE. ML:1.2 9.795E-5 1.68 AML other m 2021-09-07T05:04:40.01
IV.MPPT.EHN. ML:1.1 8.355E-5 0.3 AML other m 2021-09-07T05:04:40.26
GU.CARD.HHN. ML:1.7 0.0001555 0.76 AML other m 2021-09-07T05:04:41.42
GU.CARD.HHE. ML:1.5 9.845E-5 0.7 AML other m 2021-09-07T05:04:41.35
IV.ZCCA.HHE. ML:1.2 0.0001009 0.3 AML other m 2021-09-07T05:04:42.55
GU.MAIM.HHE. ML:1.1 3.66E-5 0.26 AML other m 2021-09-07T05:04:43.19
IV.CRMI.HHE. ML:0.8 2.41E-5 0.18 AML other m 2021-09-07T05:04:43.27
IV.CRMI.HHN. ML:0.9 3.145E-5 1.34 AML other m 2021-09-07T05:04:43.93
GU.MAIM.HHN. ML:1.2 4.59E-5 0.48 AML other m 2021-09-07T05:04:44.28
IV.SEI.HHE. ML:1.1 5.36E-5 1.06 AML other m 2021-09-07T05:04:45.02
IV.SEI.HHN. ML:1.1 5.83E-5 0.28 AML other m 2021-09-07T05:04:45.71
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