Earthquake with magnitude of ML 1.4 on date 11-02-2021 and time 11:25:36 (UTC) in region 3 km SW Bolognola (MC)

A magnitude ML 1.4 earthquake occured in region: 3 km SW Bolognola (MC), on

  • 11-02-2021 11:25:36 (UTC)
  • 11-02-2021 12:25:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.97, 13.21 at 6 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
Bolognola MC 3 142 142
Ussita MC 7 444 586
Acquacanina MC 7 121 707
Fiastra MC 8 559 1266
Castelsantangelo sul Nera MC 10 281 1547
Sarnano MC 10 3264 4811
Visso MC 11 1107 5918
Montefortino FM 11 1178 7096
Amandola FM 12 3629 10725
Fiordimonte MC 12 202 10927
Montemonaco AP 13 604 11531
Pievebovigliana MC 14 866 12397
Gualdo MC 15 815 13212
Pieve Torina MC 15 1458 14670
Cessapalombo MC 16 512 15182
Comunanza AP 17 3166 18348
Monte Cavallo MC 17 145 18493
Preci PG 17 724 19217
San Ginesio MC 18 3498 22715
Montegallo AP 18 523 23238
Muccia MC 18 915 24153
Camporotondo di Fiastrone MC 18 563 24716
Caldarola MC 19 1823 26539
Smerillo FM 20 365 26904
Monte San Martino MC 20 765 27669
Penna San Giovanni MC 20 1108 28777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
53 Km NW of Teramo (54892 inhabitants)
65 Km NE of Terni (111501 inhabitants)
68 Km E of Perugia (166134 inhabitants)
71 Km N of L'Aquila (69753 inhabitants)
76 Km SW of Ancona (100861 inhabitants)
92 Km NW of Montesilvano (53738 inhabitants)
98 Km S of Fano (60888 inhabitants)
100 Km NW of Pescara (121014 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Reviewed
Rev100
ML 1.4 2021-02-11
11:25:36
42.97 13.21 6 2021-02-11
11:33:33
Sala Sismica INGV-Roma 87040181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-11 11:25:36 ± 0.24
Latitude 42.97 ± 0.01
Longitude 13.21 ± 0.01
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87040181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 550
Semi-minor axis of confidence ellipse (meter) 194
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 264
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.22573
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.6
Num. used stations 10
Type of magnitude ML
Reference to an origin 87040181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-11 11:33:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2021-02-11T11:27:23.04 3.0 undecidable manual Sg 6.9 0
IV.AMUR.HHZ. 2021-02-11T11:27:20.51 3.0 undecidable manual Sg 9.98 0
IV.HAGA.HHZ. 2021-02-11T11:27:02.94 3.0 undecidable manual Pn -1.99 0
IV.FERC.HNZ. 2021-02-11T11:26:58.99 3.0 undecidable manual Pg 5.73 0
GU.GSCL.HHZ. 2021-02-11T11:26:44.03 3.0 undecidable manual Sg 0.47 0
MN.PDG.HHZ. 2021-02-11T11:26:37.55 3.0 undecidable manual Pn -6.94 0
IV.VIVA.HHZ. 2021-02-11T11:26:24.39 3.0 undecidable manual S 1.9 0
IV.FIR.HHZ. 2021-02-11T11:26:21.41 3.0 undecidable manual S -5.08 0
IV.CAPR.HNZ. 2021-02-11T11:26:20.71 3.0 undecidable manual Pn -8.94 0
IV.CESI.HHZ. 2021-02-11T11:25:46.39 0.6 undecidable manual S 278 0.2257 103 0.54 44
IV.MML1.HNZ. 2021-02-11T11:25:46.09 0.3 undecidable manual S 309 0.2239 103 0.29 70
IV.MF5.EHZ. 2021-02-11T11:25:44.78 0.6 undecidable manual S 85 0.1835 106 0.52 45
IV.NRCA.HHZ. 2021-02-11T11:25:43.51 0.3 undecidable manual S 207 0.1556 108 0.27 71
IV.PE3.EHZ. 2021-02-11T11:25:42.56 3.0 positive manual P -8.81 0
IV.GUMA.HHZ. 2021-02-11T11:25:42.48 0.3 undecidable manual S 45 0.1286 112 0.21 73
IV.CESI.HHZ. 2021-02-11T11:25:42.01 0.1 undecidable manual P 278 0.2257 103 -0.07 98
IV.MF5.EHZ. 2021-02-11T11:25:42.02 0.1 undecidable manual P 85 0.1835 106 0.86 78
IV.MMO1.EHZ. 2021-02-11T11:25:41.04 0.6 undecidable manual S 130 0.1124 115 -0.65 43
IV.CSP1.EHZ. 2021-02-11T11:25:41.72 0.3 undecidable manual S 358 0.1196 113 -0.23 72
IV.FDMO.HHZ. 2021-02-11T11:25:41.86 0.6 undecidable manual S 306 0.1106 115 0.23 48
IV.MML1.HNZ. 2021-02-11T11:25:41.77 0.1 undecidable manual P 309 0.2239 103 -0.28 94
IV.MC2.EHZ. 2021-02-11T11:25:40.18 0.3 undecidable manual S 194 0.063 129 0.12 75
IV.NRCA.HHZ. 2021-02-11T11:25:40.40 0.1 undecidable manual P 207 0.1556 108 -0.18 97
IV.MMO1.EHZ. 2021-02-11T11:25:39.18 0.6 positive manual P 130 0.1124 115 -0.5 46
IV.CSP1.EHZ. 2021-02-11T11:25:39.53 0.1 undecidable manual P 358 0.1196 113 -0.3 95
IV.GUMA.HHZ. 2021-02-11T11:25:39.76 0.1 undecidable manual P 45 0.1286 112 -0.25 96
IV.FDMO.HHZ. 2021-02-11T11:25:39.58 0.1 undecidable manual P 306 0.1106 115 -0.07 100
IV.MC2.EHZ. 2021-02-11T11:25:38.63 0.1 positive manual P 194 0.063 129 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HHE. ML:1.6 0.0004055 0.26 AML other m 2021-02-11T11:25:42.70
IV.NRCA.HHN. ML:1.1 0.0001275 1.32 AML other m 2021-02-11T11:25:43.84
IV.GUMA.HHN. ML:1.6 0.0004945 1.42 AML other m 2021-02-11T11:25:44.28
IV.NRCA.HHE. ML:1.3 0.0001945 0.1 AML other m 2021-02-11T11:25:44.59
IV.EUCT.HNE. ML:4.9 0.004415 1.2 AML other m 2021-02-11T11:27:30.10
IV.EUCT.HNN. ML:5 0.0051 1.68 AML other m 2021-02-11T11:27:30.09
IV.MF5.EHE. ML:1.3 0.0001568133 1.1392 AML other m 2021-02-11T11:25:49.41
IV.MF5.EHN. ML:1.2 0.000117531315 0.5056 AML other m 2021-02-11T11:25:49.48
IV.CSP1.EHE. ML:1.2 0.0001801292 0.224 AML other m 2021-02-11T11:25:42.82
IV.CSP1.EHN. ML:1.3 0.00023537905 0.32 AML other m 2021-02-11T11:25:41.86
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download