Earthquake with magnitude of ML 1.1 on date 12-09-2021 and time 13:09:39 (Italy) in region 7 km E Monteleone di Spoleto (PG)

A magnitude ML 1.1 earthquake occured in region: 7 km E Monteleone di Spoleto (PG), on

  • 12-09-2021 11:09:39 (UTC)
  • 12-09-2021 13:09:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.647, 13.035 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
Monteleone di Spoleto PG 7 599 599
Cascia PG 8 3217 3816
Cittareale RI 11 482 4298
Poggiodomo PG 11 117 4415
Leonessa RI 11 2435 6850
Posta RI 15 694 7544
Norcia PG 17 4957 12501
Borbona RI 17 617 13118
Polino TR 17 233 13351
Scheggino PG 18 461 13812
Accumoli RI 18 667 14479
Sant'Anatolia di Narco PG 19 564 15043
Vallo di Nera PG 20 364 15407

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Terni (111501 inhabitants)
44 Km SE of Foligno (57155 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
55 Km W of Teramo (54892 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
76 Km NE of Guidonia Montecelio (88673 inhabitants)
78 Km N of Tivoli (56533 inhabitants)
80 Km E of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
95 Km NE of Roma (2864731 inhabitants)
99 Km W of Chieti (51815 inhabitants)
99 Km W of Pescara (121014 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 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 1.1 2021-09-12
11:09:39
42.6473 13.0348 9 2021-09-12
11:14:41
Sala Sismica INGV-Roma 95342551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 11:09:39 ± 0.07
Latitude 42.6473 ± 0.0036
Longitude 13.0348 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95342551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 13
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
Epicentral distance of station farthest from the epicenter (degree) 0.46135
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 95342551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-12 11:14:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RNI2.HHZ. 2021-09-12T11:10:04.53 3.0 negative manual Pg 0.3 0
IV.CSP1.EHZ. 2021-09-12T11:09:56.17 0.3 undecidable manual S 16 0.4614 50 0.18 68
IV.FDMO.HHZ. 2021-09-12T11:09:53.89 0.3 undecidable manual S 6 0.3903 50 -0.01 72
IV.CSP1.EHZ. 2021-09-12T11:09:48.96 0.1 undecidable manual P 16 0.4614 50 0 95
IV.SMA1.EHZ. 2021-09-12T11:09:48.49 0.3 undecidable manual S 94 0.2212 110 0.06 74
IV.FDMO.HHZ. 2021-09-12T11:09:47.58 0.1 undecidable manual P 6 0.3903 50 -0.18 93
IV.RM33.EHZ. 2021-09-12T11:09:47.09 0.3 undecidable manual S 136 0.1916 113 -0.25 71
IV.NRCA.HHZ. 2021-09-12T11:09:47.37 0.3 undecidable manual S 17 0.1952 112 -0.1 73
IV.NRCA.HHZ. 2021-09-12T11:09:44.00 0.1 undecidable manual P 17 0.1952 112 -0.04 99
IV.ARVD.HHZ. 2021-09-12T11:09:44.66 3.0 undecidable manual P -9.99 0
IV.GAVE.EHZ. 2021-09-12T11:09:44.59 0.3 undecidable manual S 293 0.1124 125 -0.08 75
IV.SMA1.EHZ. 2021-09-12T11:09:44.77 0.1 undecidable manual P 94 0.2212 110 0.17 96
IV.RM33.EHZ. 2021-09-12T11:09:43.90 0.1 undecidable manual P 136 0.1916 113 -0.07 98
IV.GAVE.EHZ. 2021-09-12T11:09:42.50 0.1 undecidable manual P 293 0.1124 125 0.07 100
IV.LNSS.HHZ. 2021-09-12T11:09:41.60 0.1 undecidable manual P 175 0.045 151 0.21 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.1 0.0002315 0.54 AML other m 2021-09-12T11:09:43.65
IV.LNSS.HHN. ML:1 0.000169 0.9 AML other m 2021-09-12T11:09:44.97
IV.RM33.EHN. ML:1.3 0.000137 0.16 AML other m 2021-09-12T11:09:47.38
IV.NRCA.HHE. ML:1.4 0.00019 0.14 AML other m 2021-09-12T11:09:47.59
IV.RM33.EHE. ML:1 7.39E-5 0.28 AML other m 2021-09-12T11:09:48.55
IV.NRCA.HHN. ML:1.1 9.31E-5 0.36 AML other m 2021-09-12T11:09:48.80
IV.FDMO.HHE. ML:0.9 2.415E-5 0.26 AML other m 2021-09-12T11:09:54.29
IV.FDMO.HHN. ML:0.9 2.685E-5 0.26 AML other m 2021-09-12T11:09:54.41
IV.GAVE.EHE. ML:1.2 0.0001792326 0.224 AML other m 2021-09-12T11:09:45.59
IV.GAVE.EHN. ML:1.2 0.00016974675 0.2816 AML other m 2021-09-12T11:09:44.97
IV.SMA1.EHE. ML:1.2 9.002383E-5 0.2816 AML other m 2021-09-12T11:09:49.03
IV.SMA1.EHN. ML:0.7 2.9085705E-5 0.1408 AML other m 2021-09-12T11:09:49.26
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