Earthquake with magnitude of ML 1.2 on date 18-09-2020 and time 17:55:50 (UTC) in region 6 km NW Micigliano (RI)

A magnitude ML 1.2 earthquake occured in region: 6 km NW Micigliano (RI), on

  • 18-09-2020 17:55:50 (UTC)
  • 18-09-2020 19:55:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5, 13.02 at 17 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
Micigliano RI 6 127 127
Posta RI 7 694 821
Leonessa RI 9 2435 3256
Borbona RI 9 617 3873
Cantalice RI 10 2755 6628
Antrodoco RI 10 2588 9216
Borgo Velino RI 11 972 10188
Poggio Bustone RI 11 2055 12243
Castel Sant'Angelo RI 11 1308 13551
Cittaducale RI 14 6828 20379
Rivodutri RI 14 1253 21632
Morro Reatino RI 16 373 22005
Rieti RI 17 47698 69703
Cagnano Amiterno AQ 17 1369 71072
Polino TR 17 233 71305
Cittareale RI 18 482 71787
Monteleone di Spoleto PG 18 599 72386
Labro RI 18 374 72760
Montereale AQ 19 2581 75341
Concerviano RI 20 291 75632
Colli sul Velino RI 20 533 76165

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Terni (111501 inhabitants)
35 Km W of L'Aquila (69753 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
59 Km W of Teramo (54892 inhabitants)
60 Km NE of Guidonia Montecelio (88673 inhabitants)
62 Km NE of Tivoli (56533 inhabitants)
76 Km E of Viterbo (67173 inhabitants)
80 Km NE of Roma (2864731 inhabitants)
85 Km SE of Perugia (166134 inhabitants)
92 Km N of Velletri (53303 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
96 Km W of Chieti (51815 inhabitants)
98 Km W 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 1.2 2020-09-18
17:55:50
42.5 13.02 17 2020-09-18
18:01:48
Sala Sismica INGV-Roma 83011031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-18 17:55:50 ± 0.14
Latitude 42.50 ± 0.01
Longitude 13.02 ± 0.01
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83011031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 216
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 670
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.10612
Epicentral distance of station farthest from the epicenter (degree) 0.34264
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 83011031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-18 18:01:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2020-09-18T17:56:03.41 0.1 undecidable manual S 12 0.3426 103 -0.25 92
IV.SMA1.EHZ. 2020-09-18T17:56:01.96 0.1 undecidable manual S 60 0.2671 108 0.47 86
IV.FIAM.HHZ. 2020-09-18T17:56:00.76 0.1 undecidable manual S 163 0.2401 111 0.01 97
IV.ARRO.EHZ. 2020-09-18T17:55:59.95 0.1 undecidable manual S 294 0.205 115 0.17 96
IV.RM33.EHZ. 2020-09-18T17:55:58.04 0.1 undecidable manual S 85 0.143 128 -0.19 98
IV.NRCA.HHZ. 2020-09-18T17:55:58.00 0.1 positive manual P 12 0.3426 103 -0.26 92
IV.SMA1.EHZ. 2020-09-18T17:55:57.03 0.3 positive manual P 60 0.2671 108 0.02 72
IV.LNSS.HHZ. 2020-09-18T17:55:57.39 0.1 undecidable manual S 8 0.1061 138 -0.02 100
IV.ARRO.EHZ. 2020-09-18T17:55:56.10 0.1 negative manual P 294 0.205 115 0.08 97
IV.FIAM.HHZ. 2020-09-18T17:55:56.56 0.6 undecidable manual P 163 0.2401 111 -0.02 49
IV.RM33.EHZ. 2020-09-18T17:55:55.10 0.1 positive manual P 85 0.143 128 -0.02 99
IV.LNSS.HHZ. 2020-09-18T17:55:54.67 0.1 positive manual P 8 0.1061 138 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.7 0.000373 0.48 AML other m 2020-09-18T17:55:57.49
IV.LNSS.HHN. ML:1.6 0.0003415 0.46 AML other m 2020-09-18T17:55:57.75
IV.RM33.EHN. ML:1 7.325E-5 1.44 AML other m 2020-09-18T17:55:58.26
IV.RM33.EHE. ML:1 7.635E-5 1.04 AML other m 2020-09-18T17:55:58.74
IV.ARRO.EHN. ML:1.3 0.0001105 0.2 AML other m 2020-09-18T17:56:00.61
IV.ARRO.EHE. ML:1.2 8.01E-5 0.18 AML other m 2020-09-18T17:56:00.60
IV.NRCA.HHN. ML:1.1 4.41E-5 0.34 AML other m 2020-09-18T17:56:04.50
IV.NRCA.HHE. ML:1.2 5.08E-5 0.14 AML other m 2020-09-18T17:56:05.14
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