Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 27-11-2020 and time 21:21:24 (Italy) in region 4 km W Amandola (FM)

A magnitude ML 1.0 earthquake occured in region: 4 km W Amandola (FM), on

  • 27-11-2020 20:21:24 (UTC)
  • 27-11-2020 21:21:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.99, 13.31 at 14 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
Amandola FM 4 3629 3629
Sarnano MC 5 3264 6893
Montefortino FM 6 1178 8071
Bolognola MC 7 142 8213
Gualdo MC 9 815 9028
Comunanza AP 9 3166 12194
Montemonaco AP 10 604 12798
Smerillo FM 11 365 13163
Acquacanina MC 12 121 13284
Monte San Martino MC 12 765 14049
Penna San Giovanni MC 12 1108 15157
Montefalcone Appennino FM 12 424 15581
San Ginesio MC 13 3498 19079
Fiastra MC 13 559 19638
Cessapalombo MC 14 512 20150
Sant'Angelo in Pontano MC 14 1436 21586
Ussita MC 15 444 22030
Force AP 15 1354 23384
Santa Vittoria in Matenano FM 16 1330 24714
Palmiano AP 16 196 24910
Camporotondo di Fiastrone MC 16 563 25473
Castelsantangelo sul Nera MC 16 281 25754
Montegallo AP 17 523 26277
Caldarola MC 18 1823 28100
Ripe San Ginesio MC 18 852 28952
Servigliano FM 18 2336 31288
Fiordimonte MC 18 202 31490
Visso MC 19 1107 32597
Falerone FM 19 3337 35934
Montelparo FM 19 778 36712
Monteleone di Fermo FM 19 395 37107
Venarotta AP 19 2066 39173
Roccafluvione AP 20 2010 41183
Colmurano MC 20 1263 42446
Pievebovigliana MC 20 866 43312

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NW of Teramo (54892 inhabitants)
49 Km E of Foligno (57155 inhabitants)
71 Km N of L'Aquila (69753 inhabitants)
72 Km S of Ancona (100861 inhabitants)
72 Km NE of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
87 Km NW of Montesilvano (53738 inhabitants)
94 Km NW of Pescara (121014 inhabitants)
98 Km S of Fano (60888 inhabitants)
100 Km NW of Chieti (51815 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 1.0 2020-11-27
20:21:24		 42.99 13.31 14 2020-11-27
21:07:47		 Sala Sismica INGV-Roma 85055881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-27 20:21:24 ± 0.1
Latitude 42.99 ± 0.00
Longitude 13.31 ± 0.01
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85055881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 464
Semi-minor axis of confidence ellipse (meter) 189
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.24282
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85055881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-27 21:07:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MTRA.HNE. 2020-11-27T20:21:33.83 0.6 undecidable manual S 164 0.2428 100 -0.31 46
IV.NRCA.HHZ. 2020-11-27T20:21:33.20 0.6 undecidable manual S 222 0.2113 103 -0.02 48
IV.PF6.EHE. 2020-11-27T20:21:31.78 0.6 undecidable manual S 331 0.1691 110 -0.23 47
IV.FDMO.HHZ. 2020-11-27T20:21:31.87 0.6 undecidable manual S 286 0.1673 110 -0.11 49
IV.CSP1.EHZ. 2020-11-27T20:21:30.66 0.6 undecidable manual S 323 0.1259 121 -0.22 48
IV.MC2.EHZ. 2020-11-27T20:21:30.76 0.6 undecidable manual S 228 0.1178 124 0.1 48
IV.MF5.EHZ. 2020-11-27T20:21:30.84 0.6 undecidable manual S 91 0.1115 126 0.33 47
IV.NRCA.HHZ. 2020-11-27T20:21:29.56 0.3 undecidable manual P 222 0.2113 103 0.06 72
IV.GUMA.HHN. 2020-11-27T20:21:29.63 0.6 undecidable manual S 16 0.0746 141 -0.09 49
IV.MMO1.EHZ. 2020-11-27T20:21:29.68 0.6 undecidable manual S 171 0.0926 133 -0.4 47
IV.MTRA.HNE. 2020-11-27T20:21:29.81 0.1 undecidable manual P 164 0.2428 100 -0.22 94
IV.MF5.EHZ. 2020-11-27T20:21:28.05 0.1 undecidable manual P 91 0.1115 126 0.11 99
IV.CSP1.EHZ. 2020-11-27T20:21:28.11 0.1 undecidable manual P 323 0.1259 121 -0.04 99
IV.PF6.EHE. 2020-11-27T20:21:28.71 0.1 undecidable manual P 331 0.1691 110 -0.1 97
IV.MC2.EHZ. 2020-11-27T20:21:28.38 0.3 undecidable manual P 228 0.1178 124 0.36 69
IV.FDMO.HHZ. 2020-11-27T20:21:28.78 0.1 undecidable manual P 286 0.1673 110 0 98
IV.SAP2.EHE. 2020-11-27T20:21:28.42 0.3 undecidable manual P 32 0.125 121 0.28 71
IV.GUMA.HHN. 2020-11-27T20:21:27.55 0.1 undecidable manual P 16 0.0746 141 0.06 100
IV.MMO1.EHZ. 2020-11-27T20:21:27.53 1.0 undecidable manual P 171 0.0926 133 -0.16 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MF5.EHE. ML:0.3 2.06540834E-5 0.4992 AML other m 2020-11-27T20:21:31.42
IV.MF5.EHN. ML:0.3 2.108983E-5 0.7424 AML other m 2020-11-27T20:21:35.88
IV.CSP1.EHE. ML:0.8 5.3219935E-5 0.064 AML other m 2020-11-27T20:21:31.03
IV.CSP1.EHN. ML:1 9.0314935E-5 0.0896 AML other m 2020-11-27T20:21:31.02
IV.FDMO.HHE. ML:0.3 1.41282855E-5 0.2048 AML other m 2020-11-27T20:21:32.15
IV.FDMO.HHN. ML:0.3 1.2687299E-5 0.1536 AML other m 2020-11-27T20:21:32.17
IV.NRCA.HHE. ML:0.9 5.084096E-5 0.128 AML other m 2020-11-27T20:21:33.77
IV.NRCA.HHN. ML:0.8 4.1746525E-5 0.1024 AML other m 2020-11-27T20:21:33.88
IV.NRCA.HNE. ML:1.2 0.00010140052 0.4736 AML other m 2020-11-27T20:21:33.47
IV.NRCA.HNN. ML:1.4 0.0001492236 0.9088 AML other m 2020-11-27T20:21:42.02
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