Earthquake with magnitude of ML 2.2 on date 22-04-2021 and time 12:27:51 (UTC) in region 3 km W Palazzuolo sul Senio (FI)

A magnitude ML 2.2 earthquake occured in region: 3 km W Palazzuolo sul Senio (FI), on

  • 22-04-2021 12:27:51 (UTC)
  • 22-04-2021 14:27:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.106, 11.508 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Palazzuolo sul Senio FI 3 1154 1154
Marradi FI 9 3139 4293
Firenzuola FI 10 4726 9019
Castel del Rio BO 12 1246 10265
Casola Valsenio RA 16 2617 12882
Fontanelice BO 17 1943 14825
Tredozio FC 19 1212 16037
Borgo San Lorenzo FI 19 18211 34248
Vicchio FI 19 8044 42292
Monghidoro BO 20 3749 46041

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Imola (69797 inhabitants)
36 Km SW of Faenza (58541 inhabitants)
41 Km NE of Prato (191150 inhabitants)
42 Km NE of Firenze (382808 inhabitants)
45 Km W of Forlì (117913 inhabitants)
45 Km SE of Bologna (386663 inhabitants)
47 Km NE of Scandicci (50609 inhabitants)
51 Km E of Pistoia (90315 inhabitants)
59 Km W of Cesena (96758 inhabitants)
65 Km SW of Ravenna (159116 inhabitants)
76 Km SE of Modena (184973 inhabitants)
77 Km NW of Arezzo (99543 inhabitants)
82 Km S of Ferrara (133155 inhabitants)
85 Km W of Rimini (147750 inhabitants)
86 Km E of Lucca (89046 inhabitants)
89 Km N of Siena (53903 inhabitants)
90 Km SE of Carpi (70699 inhabitants)
96 Km SE of Reggio nell'Emilia (171345 inhabitants)
99 Km E of Pisa (89158 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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 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
Bulletin
Rev1000
ML 2.2 2021-04-22
12:27:51
44.1058 11.5085 10 2021-07-12
16:55:16
Bollettino Sismico Italiano INGV 91711621
Reviewed
Rev100
ML 2.2 2021-04-22
12:27:51
44.1178 11.5147 11 2021-04-22
12:34:15
Sala Sismica INGV-Roma 89357351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-22 12:27:51 ± 0.09
Latitude 44.1058 ± 0.0063
Longitude 11.5085 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91711621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 579
Semi-minor axis of confidence ellipse (meter) 511
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 12
Circular confidence region, given by single value of horizontal uncertainty (meter) 580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
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) 0.09893
Epicentral distance of station farthest from the epicenter (degree) 0.80579
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 91711621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-22 14:11:02

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 89357351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-22 12:34:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PII.HHZ. 2021-04-22T12:28:08.00 0.3 undecidable manual P 242 0.8058 50 0.7 55
IV.CSNT.HHZ. 2021-04-22T12:28:05.70 0.6 undecidable manual P 194 0.652 50 1.03 33
IV.SFI.EHZ. 2021-04-22T12:28:04.01 0.6 undecidable manual S 129 0.3157 50 -0.03 48
IV.MPPT.EHZ. 2021-04-22T12:28:04.74 0.6 undecidable manual S 244 0.3354 50 0.12 47
IV.FNVD.HHZ. 2021-04-22T12:28:02.95 0.6 undecidable manual S 283 0.2833 50 -0.14 48
IV.BRSN.EHZ. 2021-04-22T12:28:02.50 0.3 undecidable manual P 66 0.447 50 1.34 44
IV.MOCL.EHZ. 2021-04-22T12:28:02.28 0.6 undecidable manual S 247 0.2563 50 0 49
IV.RUFI.EHZ. 2021-04-22T12:28:02.22 0.6 undecidable manual S 180 0.268 50 -0.41 45
IV.BRIS.HHZ. 2021-04-22T12:28:01.19 0.6 undecidable manual S 57 0.2194 112 0.19 48
IV.RINC.HHZ. 2021-04-22T12:28:01.46 0.6 undecidable manual S 162 0.2302 111 0.07 49
IV.MPPT.EHZ. 2021-04-22T12:27:59.02 0.1 undecidable manual P 244 0.3354 50 -0.23 92
IV.IMOL.EHZ. 2021-04-22T12:27:59.54 0.3 undecidable manual P 33 0.304 50 0.82 58
IV.ASQU.HHZ. 2021-04-22T12:27:59.58 0.3 undecidable manual P 147 0.3687 50 -0.25 68
IV.LMD.HHZ. 2021-04-22T12:27:58.12 0.6 undecidable manual S 101 0.1457 121 -0.31 47
IV.RONT.HHZ. 2021-04-22T12:27:58.35 0.6 undecidable manual S 206 0.125 125 0.59 44
IV.SFI.EHZ. 2021-04-22T12:27:58.55 0.1 undecidable manual P 129 0.3157 50 -0.36 90
IV.MOCL.EHZ. 2021-04-22T12:27:57.66 0.1 undecidable manual P 247 0.2563 50 -0.24 94
IV.RINC.HHZ. 2021-04-22T12:27:57.31 0.3 undecidable manual P 162 0.2302 111 -0.08 73
IV.RUFI.EHZ. 2021-04-22T12:27:57.85 0.1 positive manual P 180 0.268 50 -0.25 93
IV.MTRZ.HHZ. 2021-04-22T12:27:57.29 0.3 undecidable manual P 344 0.2149 112 0.22 71
IV.FNVD.HHZ. 2021-04-22T12:27:57.98 0.1 undecidable manual P 283 0.2833 50 -0.38 90
IV.SEI.HHZ. 2021-04-22T12:27:57.84 0.6 undecidable manual S 244 0.1196 126 0.25 48
IV.BRIS.HHZ. 2021-04-22T12:27:57.00 0.3 undecidable manual P 57 0.2194 112 -0.16 72
IV.VISG.HHZ. 2021-04-22T12:27:56.39 0.6 undecidable manual S 327 0.0989 131 -0.57 44
IV.SEI.HHZ. 2021-04-22T12:27:55.24 0.1 undecidable manual P 244 0.1196 126 0.05 100
IV.LMD.HHZ. 2021-04-22T12:27:55.43 0.1 positive manual P 101 0.1457 121 -0.25 96
IV.RONT.HHZ. 2021-04-22T12:27:55.58 0.1 positive manual P 206 0.125 125 0.29 95
IV.VISG.HHZ. 2021-04-22T12:27:54.58 0.1 undecidable manual P 327 0.0989 131 -0.25 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.6 0.005382227 0.2624 AML other m 2021-04-22T12:27:57.10
IV.VISG.HHN. ML:2.7 0.006019044 0.3456 AML other m 2021-04-22T12:27:57.86
IV.SEI.HHE. ML:2.8 0.0075939005 1.7376 AML other m 2021-04-22T12:27:58.97
IV.SEI.HHN. ML:3.4 0.0249464 0.2176 AML other m 2021-04-22T12:27:58.17
IV.RONT.HHE. ML:2.8 0.006445592 0.2048 AML other m 2021-04-22T12:27:59.78
IV.RONT.HHN. ML:2.9 0.0093971365 0.3392 AML other m 2021-04-22T12:27:59.96
IV.BRIS.HNN. ML:1.5 0.0001846259 0.9088 AML other m 2021-04-22T12:28:00.62
IV.LMD.HHE. ML:2.1 0.00121 1.72 AML other m 2021-04-22T12:28:01.02
IV.BRIS.HHN. ML:2.4 0.00169 0.18 AML other m 2021-04-22T12:28:01.89
IV.LMD.HHN. ML:2.1 0.00112 0.22 AML other m 2021-04-22T12:28:01.96
IV.RINC.HHE. ML:2.1 0.000727 0.28 AML other m 2021-04-22T12:28:02.14
IV.MOCL.EHN. ML:2.1 0.000715 1.8 AML other m 2021-04-22T12:28:02.02
IV.FNVD.HHN. ML:2.3 0.0009512176 0.2624 AML other m 2021-04-22T12:28:03.40
IV.FNVD.HHE. ML:2.1 0.000621 0.66 AML other m 2021-04-22T12:28:03.21
IV.MOCL.EHE. ML:2.1 0.00069975015 0.1792 AML other m 2021-04-22T12:28:03.55
IV.SFI.HNN. ML:2 0.0004535525 0.448 AML other m 2021-04-22T12:28:04.38
IV.SFI.EHN. ML:2 0.00042751155 0.2624 AML other m 2021-04-22T12:28:04.82
IV.SFI.EHE. ML:2 0.0004301889 0.1792 AML other m 2021-04-22T12:28:05.52
IV.SFI.HNE. ML:2 0.00045721275 0.1856 AML other m 2021-04-22T12:28:05.52
IV.MPPT.EHE. ML:1.8 0.00025727315 0.2432 AML other m 2021-04-22T12:28:05.79
IV.ASQU.HHE. ML:2.2 0.000468 1.76 AML other m 2021-04-22T12:28:06.00
IV.RUFI.EHE. ML:1.9 0.00038362765 0.6592 AML other m 2021-04-22T12:28:06.47
IV.ASQU.HHN. ML:2.1 0.00039135465 0.5632 AML other m 2021-04-22T12:28:06.15
IV.MTRZ.HHE. ML:2.3 0.001185 0.42 AML other m 2021-04-22T12:28:06.25
IV.MTRZ.HNE. ML:2.3 0.0011475985 0.4224 AML other m 2021-04-22T12:28:06.26
IV.BRIS.HHE. ML:2.4 0.00168 0.4 AML other m 2021-04-22T12:28:06.31
IV.MTRZ.HNN. ML:2.2 0.0011242531 0.5504 AML other m 2021-04-22T12:28:07.68
IV.MTRZ.HHN. ML:2.2 0.00109264645 0.5376 AML other m 2021-04-22T12:28:07.67
IV.MPPT.EHN. ML:1.8 0.0002281013 0.2432 AML other m 2021-04-22T12:28:07.80
IV.RUFI.EHN. ML:1.7 0.0002615 1.56 AML other m 2021-04-22T12:28:07.99
IV.RINC.HHN. ML:1.9 0.000547 0.54 AML other m 2021-04-22T12:28:08.62
IV.BRIS.HNE. ML:1.2 9.2568665E-5 1.1872 AML other m 2021-04-22T12:28:10.21
IV.IMOL.HNN. ML:2.3 0.000921 0.34 AML other m 2021-04-22T12:28:11.14
IV.BRSN.EHE. ML:2.4 0.0006436638 0.32 AML other m 2021-04-22T12:28:12.62
IV.BRSN.HNE. ML:2.4 0.00071089105 0.32 AML other m 2021-04-22T12:28:12.79
IV.IMOL.HNE. ML:2.3 0.0008298128 0.3584 AML other m 2021-04-22T12:28:13.54
IV.PII.HHE. ML:2.2 0.00017435975 0.3392 AML other m 2021-04-22T12:28:19.78
IV.BRSN.HNN. ML:2.4 0.00064425595 0.5888 AML other m 2021-04-22T12:28:24.51
IV.BRSN.EHN. ML:2.4 0.00066392725 0.5824 AML other m 2021-04-22T12:28:24.51
IV.PII.HHN. ML:2.2 0.0001745 0.38 AML other m 2021-04-22T12:28:24.88
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download