Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 12-09-2021 and time 19:51:02 (Italy) in region 3 km E Bolognola (MC)

A magnitude ML 0.9 earthquake occured in region: 3 km E Bolognola (MC), on

  • 12-09-2021 17:51:02 (UTC)
  • 12-09-2021 19:51:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9950, 13.2680 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.

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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
Sarnano MC 5 3264 3406
Amandola FM 7 3629 7035
Montefortino FM 8 1178 8213
Acquacanina MC 9 121 8334
Gualdo MC 10 815 9149
Fiastra MC 10 559 9708
Montemonaco AP 12 604 10312
Ussita MC 12 444 10756
Comunanza AP 13 3166 13922
Cessapalombo MC 13 512 14434
San Ginesio MC 13 3498 17932
Smerillo FM 15 365 18297
Castelsantangelo sul Nera MC 15 281 18578
Penna San Giovanni MC 15 1108 19686
Monte San Martino MC 15 765 20451
Fiordimonte MC 15 202 20653
Camporotondo di Fiastrone MC 15 563 21216
Montefalcone Appennino FM 16 424 21640
Sant'Angelo in Pontano MC 16 1436 23076
Visso MC 16 1107 24183
Caldarola MC 16 1823 26006
Pievebovigliana MC 17 866 26872
Montegallo AP 18 523 27395
Ripe San Ginesio MC 18 852 28247
Pieve Torina MC 19 1458 29705
Force AP 19 1354 31059
Palmiano AP 19 196 31255
Santa Vittoria in Matenano FM 19 1330 32585
Belforte del Chienti MC 19 1886 34471

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km E of Foligno (57155 inhabitants)
52 Km NW of Teramo (54892 inhabitants)
70 Km NE of Terni (111501 inhabitants)
72 Km S of Ancona (100861 inhabitants)
72 Km N of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
90 Km NW of Montesilvano (53738 inhabitants)
97 Km S of Fano (60888 inhabitants)
97 Km NW of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.9 2021-09-12
17:51:02		 42.995 13.2685 24 2021-09-12
18:03:56		 Sala Sismica INGV-Roma 95357461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 17:51:02 ± 0.17
Latitude 42.9950 ± 0.0063
Longitude 13.2685 ± 0.0098
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95357461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 856
Semi-minor axis of confidence ellipse (meter) 332
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95357461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-12 18:03:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.RNCA.HHZ. 2021-09-12T17:52:12.22 3.0 undecidable manual Sn -7.1 0
IV.SGAL.EHZ. 2021-09-12T17:51:56.51 3.0 positive manual Pg 13.38 0
GU.CARD.HHZ. 2021-09-12T17:51:53.30 3.0 undecidable manual Sn -0.48 0
IV.GIZZ.HHZ. 2021-09-12T17:51:53.07 3.0 positive manual Pg 5.38 0
IV.MMGO.HHZ. 2021-09-12T17:51:53.45 3.0 undecidable manual Pg 4.39 0
IV.VOBA.EHZ. 2021-09-12T17:51:52.67 3.0 undecidable manual Pg 9.2 0
IV.RESU.HHZ. 2021-09-12T17:51:47.58 3.0 undecidable manual Pn -4.15 0
IV.SELL.HHZ. 2021-09-12T17:51:44.37 3.0 undecidable manual Pn -6.5 0
IV.FIR.HHZ. 2021-09-12T17:51:41.57 3.0 undecidable manual Sn -0.34 0
IV.PESA.HHZ. 2021-09-12T17:51:41.25 3.0 undecidable manual Sn -2.07 0
IV.ARVD.HHZ. 2021-09-12T17:51:36.85 3.0 undecidable manual Sn 3.56 0
IV.PP3.EHZ. 2021-09-12T17:51:34.36 3.0 undecidable manual Sn -1.59 0
IV.PP3.EHZ. 2021-09-12T17:51:21.93 3.0 positive manual Pg 8.37 0
IV.FDMO.HHZ. 2021-09-12T17:51:11.06 0.3 undecidable manual S 287 15.3735 143 -0.1 74
IV.CSP1.EHZ. 2021-09-12T17:51:10.68 0.3 undecidable manual S 334 11.877 150 0.03 75
IV.MC2.EHZ. 2021-09-12T17:51:10.84 0.3 undecidable manual S 215 11.2776 151 0.27 72
IV.MMO1.EHZ. 2021-09-12T17:51:10.36 0.3 undecidable manual S 156 11.5773 151 -0.25 72
IV.MML1.EHZ. 2021-09-12T17:51:08.90 0.3 undecidable manual P 299 27.4503 125 0.02 73
IV.FDMO.HHZ. 2021-09-12T17:51:07.53 0.3 undecidable manual P 287 15.3735 143 0 75
IV.MF5.EHZ. 2021-09-12T17:51:07.64 0.1 negative manual P 93 15.5733 143 0.1 98
IV.CSP1.EHZ. 2021-09-12T17:51:07.18 0.1 undecidable manual P 334 11.877 150 -0.05 100
IV.MC2.EHZ. 2021-09-12T17:51:07.23 0.1 undecidable manual P 215 11.2776 151 0.04 100
IV.MMO1.EHZ. 2021-09-12T17:51:06.94 1.0 undecidable manual P 156 11.5773 151 -0.27 24
IV.ARRO.EHZ. 2021-09-12T17:51:01.43 3.0 negative manual P 1.95 0
IV.TOLF.HHZ. 2021-09-12T17:50:55.17 3.0 undecidable manual S -0.42 0
IV.VIVA.HHZ. 2021-09-12T17:50:49.41 3.0 negative manual P -4.48 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.0 0.0000564 0.2 AML other m 2021-09-12T17:51:11.31
IV.FDMO.HHN. ML:1.0 0.0000591 0.32 AML other m 2021-09-12T17:51:11.39
IV.MML1.EHE. ML:0.8 0.000023899999999999998 0.2 AML other m 2021-09-12T17:51:14.41
IV.MML1.EHN. ML:0.8 0.00002395 0.48 AML other m 2021-09-12T17:51:15.38
IV.CSP1.EHE. ML:1.0 0.00006661782 0.0768 AML other m 2021-09-12T17:51:10.80
IV.CSP1.EHN. ML:1.1 0.000070588405 0.0896 AML other m 2021-09-12T17:51:10.79
IV.MF5.EHE. ML:0.6 0.0000202404 0.128 AML other m 2021-09-12T17:51:12.35
IV.MF5.EHN. ML:0.9 0.000040300095000000004 0.1792 AML other m 2021-09-12T17:51:11.86
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